What to do in a Southern California garden in August

What to do in a Southern California garden in August

At some point in August, I do grow tired of summer. There’s just always a day where I say, OK, enough of the heat, I look forward to the return of crisp nights and rainfall. Some plants start to look tired in August too. Look at this weary Honey Nut butternut squash vine that was planted way back in March:

On the other hand, citrus trees and avocados never want summer to end. They come from places where it never cools down as much as it does here in Southern California. Look how happy the foliage is on that Reed avocado tree at the top of the page. Bananas, cherimoyas, mangos, and macadamia nut trees love August too, as illustrated by these new leaves at the top of my young Linda macadamia:


While August may seem like a month that is thoroughly summer, for vegetable gardeners it is similar to March in that both are months of transition. In March, in Southern California, we move from plants that like to grow in cool weather to plants that like to grow in warm weather. Here in August, we eat from our plants that like to grow in warm weather — like butternut squash — while we begin sowing seeds of plants that like to grow in the cool weather that arrives in fits and spasms starting late in the month of September. These seeds are of plants like broccoli and potatoes.

So enjoy the changing of the seasons, even as it’s mid-summer.


Sow and plant

– Sow seeds of: (warm-season) basil, beans;  (cool-season) broccoli, brussels sprouts, cabbage, cauliflower, kohlrabi, potatoes

*Note on sowing: it’s tough to keep the seeds of broccoli, etc. cool and moist enough in August if you sow them in the ground; I have better success sowing them in module trays that I keep in the relative cool and shade of my garage until the seeds have germinated (see photo below); but hey, don’t sweat it if you don’t feel like growing these plants from seed — just wait to buy seedlings at a nursery in September

Module tray

– Plant seedlings of: basil and beans

– Plant subtropical fruit trees like citrus and avocado, as well as vines like passion fruit; they love settling into the warm soil of mid-summer; just be sure to water broadly and deeply at planting time, and then water frequently for the rest of the summer; see my post about how to water a newly planted avocado tree; this schedule for avocados can be used for citrus, macadamias, mangos, passion fruit and other subtropicals too


Harvest and eat

– Eat these vegetables (had you planted them): tomatoes, tomatillos, potatoes, corn, greens, onion, beets, carrots, peppers, eggplant, squash, basil, cucumber, melons, beans

– Eat these berries and fruits (had you planted them): grapes, avocados (Hass, Lamb, Reed), Valencia oranges, peaches, nectarines, plums, pluots



– If you didn’t do it in July, then here in August is the next and last great time this year to give a deciduous fruit tree a trim, particularly on the top, if you want it to continue making its fruit on branches low enough for you to reach in the coming years; reducing the top growth lets more light onto lower branches, which induces them to form flower buds that will open next spring; the types of trees that I give summer trims to in my yard include peaches, nectarines, apricots, plums, and pluots

– Ratchet up the frequency of watering; in August of every year in every garden I’ve had — or heard of — in Southern California, irrigation is needed more often than other months; for example, my vegetables are on drip irrigation and they need daily watering right now whereas in July they do fine with a day in between waterings


You might also like to read:

Gardening benefits of a hot summer climate

How to water plants through a heat wave

How to water a newly planted avocado tree

What to do in a Southern California garden in July

What to do in a Southern California garden in July

Stay cool. Make shade. Have a drink. Go to the beach. Harvest in the morning. Harvest in the evening.

It’s summer for all of us now — inland it’s been summer for a month; but within a mile of the beach, summer just started heating up around the Fourth of July, as usual. Take it easy in the yard this time of year. You should have planted and set up irrigation already, when it was cool. Your only job now is to reap and eat.

Make yourself a “Garden on a Pizza” pizza, like the one I made in the photo above. You can’t go wrong, just pick and chop and place. I added basil, garlic, peppers, and tomatoes from my garden, plus nectarines that my mom brought me from her tree. Spicy and sweet.

While July is the zenith of summer harvest activity, it’s the nadir for planting. If you do plant — vegetables or fruit trees — the key is to thoroughly water the soil surrounding the planting hole. The moisture there from the winter rains is now all but dried up, and that dry soil will literally suck the water out of the hole where you put in a new plant. So, upon planting, water about six inches to either side of a new vegetable and two feet to either side of a new tree, and soak it so the water goes at least as deep as the plant’s roots. It’s vital. I’ve learned this lesson the hard way, having lost plants in July in years past because of not doing this.

In addition . . .


Sow and plant

– Sow or plant these vegetables any time in July (these produce before it cools down in the fall): basil, beans, corn

– Sow seeds of these vegetables, especially later in July, or wait until August (these produce after it cools down in the fall): brussels sprouts, cabbage, kohlrabi, broccoli, cauliflower, seed potatoes; it takes just under two months for these crops (not potatoes) to go from seed to a plant of good transplanting size

– Plant seedlings of these vegetables, preferably no later than mid-July: tomatoes (small-fruited types like cherry are safest, but see note below on “fall tomatoes”), tomatillo, pepper, squash (“summer” types like zucchini and yellow crookneck are sure bets for a fall harvest), sweet potato (slips); if you plant later than mid-July there’s a good chance you’ll get little harvestable fruit before it cools in the fall

– Plant “fall tomatoes” by mid-July; I find that early planted tomatoes (March) tend to become less productive toward the end of summer and into fall, so I’ve gotten into the habit of planting a few new ones in early July in order to ensure fresh tomatoes off the vine into fall; I usually don’t get maximum production out of these plants unless we have an Indian Summer, but they’ll likely produce better than your older ones that you planted in spring; I planted a handful of varieties on July 8 last year and got decent production from most, but the best were ‘Champion’ (photo above); an ideal site for fall tomatoes is one that will get low-angle, southern sun in the fall so the fruit ripens well at that time


Harvest and eat

– Eat these vegetables (had you planted them): tomatoes, tomatillos, potatoes, corn, greens, onion, garlic, lettuce, beets, carrots, peppers, eggplant, squash, basil, cucumber, melons, beans

– Eat these berries and fruits (had you planted them): blueberries, strawberries, grapes, avocados (Hass, Lamb, Reed), Valencia oranges, apricots, peaches, nectarines, plums, SpiceZee nectaplums



– Give deciduous fruit trees a pruning after harvesting their fruit if you want to keep them down in size; this lets more light onto lower branches throughout the rest of summer, which encourages those lower branches to be fruitful next year; see this post about why I keep my deciduous fruit trees pruned to about eight feet tall

Just pruned the Blenheim apricot here in July

– Protect avocados from sunburn; if a branch is exposed to hot summer sun it will burn and the branch will decline in health, so apply a sunscreen of diluted white latex paint (as I wrote about in this post)

– Water deeply just before a heat wave hits; this is particularly helpful for vegetables and avocado trees (see this post for more about watering through a heat wave)

– Stress not about powdery mildew on squash leaves, tomato foliage, melon, cucumber and pumpkin leaves because there’s nothing you can really do about it; there is no product you can buy that will eliminate it, and there is nothing you can do to your plants (such as changing your watering method or pruning out leaves) that will eliminate it; my experience with it in different gardens is that plants closer to the ocean suffer from it more often, plants in full sun suffer from it less often than plants in some shade, some years it’s worse than others, some varieties of certain plants (such as tomatoes) get it worse than others, and as some kinds of plants get old, such as squash, they almost always get it; see this webpage from the University of California for photos of powdery mildew and details about its growth and methods of control; the bottom line is: if powdery mildew wants to take down your vegetable plant, it will, so don’t waste your energy jumping through hoops to try to stop it — P.S. I’d be happy to hear if you have different experience with this

– Stress not about those squiggly tracks caused by leafminers on your citrus leaves; citrus trees usually flush new growth around this time and little insects called leafminers like this new growth, but fear not because they don’t do serious harm to a tree and they don’t do any harm to the fruit; the damage is basically cosmetic; see my post about leafminers on my lime tree a few years back

What to do in a Southern California garden in June

What to do in a Southern California garden in June

June is the lush month. June is the jungle month, particularly toward the end. The days are at their longest and they are warm, so the garden begins to look verdant and tangled in a most wonderful way. Squash vines overtake your walking paths. Corn stalks tower overhead. Cherry tomato plants drip with red fruit. Cucumber and beans climb up their cages and strings (pictured above).

I make sure to take pictures of my garden around the solstice in late June since it never looks more bountiful.

But there’s also a sense of urgency this month. It is your last chance to plant most of those warm-season vegetables. Put them in now or you’ll have to wait until next year because, planted in July, they won’t have enough time in the heat of summer to mature a crop. (The main exceptions are corn and beans, which can be successfully planted in July.)

Below are details on doings in the vegetable garden, some fruit tree thoughts, and a few other uniquely June opportunities:

Sow and plant

– Sow or plant these vegetables: basil, beans, corn, cucumber, sweet potato, tomatillo, celery, chard, chives

– Plant seedlings of these vegetables: eggplant, pepper, melon, pumpkin, squash, tomato; if seeds of these vegetables are sown in June, especially later in the month, there’s a real risk of only getting a small crop before it cools too much at the end of the year since they take a long time to grow from seed to harvestable fruit

– Don’t bother planting cilantro; sorry to rain on your salsa parade, but cilantro is not well-suited to growing in the summer in Southern California; you’d think it would grow well with other salsa ingredients like tomatoes and peppers, but it won’t; it will start to flower fast because of the warm weather and, in my opinion, it’s not worthwhile; cilantro naturally grows in the cooler weather of late summer through the winter and spring

– Sow or plant pole beans to be used as temporary, summer shade on east- or west-facing walls or windows by growing them up strings under an eave; you can also use grapes for the purpose of shading a house

– Consider growing your own Halloween pumpkins and decorative fall corn; now’s the time to plant those in order to harvest by late October; last year, I grew the colorful corn variety called Glass Gem, which I posted photos of here

– Plant avocado and citrus trees; they feel right at home in the warmth of early summer and soon prove it to you with a flush of new leaves, which gives you an immediate sense of success that you won’t get when planting in most of the rest of the year; if you plant one, see my post “How to water a new avocado tree”

June flush on citrus

Late June new growth on a baby Cara Cara navel orange. The new growth is lime green.


Harvest and eat

corn harvest in June

This Jubilee corn, photographed on June 7, is about two weeks from harvest.

– Eat these vegetables (had you planted them): tomatoes, tomatillos, potatoes, corn, greens, onion, garlic, peas, lettuce, beets, carrots, peppers

– Don’t fret over tomatoes that have blossom end rot (rotten bottom of the fruit); it happens often to the first fruits of May and June but not to the later fruits of summer, and there’s nothing you can do about it despite what someone selling a product might claim (it’s just a symptom of the cooler weather of spring/early summer); incidentally, if you do apply a product for blossom end rot, you’ll find that — voila! — it worked: the placebo effect

– Eat these berries and fruits (had you planted them): blueberries, strawberries, raspberries, blackberries, grapes, avocados (Hass, Lamb, Reed), Valencia oranges, lemons and limes, Pixie and Gold Nugget mandarins, apricots, peaches, nectarines, plums, passion fruit

Reed and Lamb Hass avocados size comparison

June avocados: Reed on the left, and Lamb on the right

(Why do I mention what you could be harvesting and eating? So you can plan. If you want to be harvesting tomatoes next June, for example, then plant them next March. Or if you want to be eating avocados from your yard in June, then plant a Hass, Lamb, or Reed tree.)


– Water plants for “thrival” not mere survival; don’t make the mistake that I have in some past summers of being stingy with water on vegetables and fruit trees, which lowers production and defeats the point; if you scratch into the dirt around the roots of your plants, you’ll know for sure how much water they have access to, as I wrote about in this post

– Appreciate and observe the summer solstice (June 20): Have a late dinner out in the yard while you notice where the sun sets — isn’t it fascinating how far northwest it falls below the horizon on this day?


You might also like to read:

How long to run drip irrigation on vegetables

Can you grow an avocado tree in a small yard space?

Oranges and mandarins fresh off the tree almost all year

What to do in a Southern California garden in May

What to do in a Southern California garden in May

May can be spring, or May can be summer. Last year (2016) it was spring, with cloudy and showery weather, but this year so far it feels more like summer with dry breezes and lots of sun and not much May Gray yet — yet! The forecast is for it to turn back to spring for the upcoming second week of this month, with showers and cooler weather.

Cool weather is great planting weather. Take advantage, if you can.

Regardless, it’s already been plenty warm for subtropical plants to set fruit. Maybe your citrus and avocado trees are like mine: still blooming but also with pea-sized fruitlets. And maybe you planted some tomatoes in March that are already setting fruit. If May ends up being more warm like summer, we’ll even get to eat some by the end of the month.

But I chose the photo above to represent May because it’s the prettiest subtropical flower forming fruit this month in my yard. Passion fruit vines have everything beyond beauty going for them too: vibrant, evergreen foliage; vigorous growth to cover a fence or pergola; not messy when their fruit drops; tangy and tasty fruit; plus a fascinating etymology. Maybe you have a place to plant one — maybe next week?

Sometimes it feels like we live in paradise, friends. If you want to keep it going, here are some May opportunities in the yard:

Sow and plant

– Sow or plant these vegetables: tomatoes, peppers, beets, eggplant, beans, cucumber, corn, squash, melon, chard, basil

– Plant peppers and eggplant later in May if you want to be really smart about it; late May into early June is an ideal time to plant these heat lovers because if you plant earlier they’ll grow slowly and bugs can decimate them; however, if you plant later than mid-June you’re not going to get as much fruit as possible before it cools in the fall

vegetables seeds and seedlings in May

My diversified portfolio of seeds and seedlings on deck, to be planted in the ground from tomorrow through the end of May.

Harvest and eat

– Harvest wisely by doing it early in the morning for leaves of lettuce, chard, and kale; they are turgid at this hour — full of water and crunchy — and will taste best and keep fresh longest

– Stop watering onions and garlic that you planted last fall once their outer leaves start to yellow; they’ll continue to enlarge their bulbs on residual soil moisture; pick them to eat anytime, but wait until their tops are totally dead if you want to store them

– Eat these goodies (had you planted them): blueberries, strawberries, raspberries, blackberries, tomatoes (especially smaller-fruited types), potatoes, onion, garlic, broccoli (still a few final florets!), peas, lettuce, beets, carrots, peppers (if you overwintered a plant)


– Go hunting at night with a flashlight to see which bugs are eating your plants; in May, you might find earwigs on peppers, pill bugs on strawberries, june bugs on avocado leaves, slugs and snails on lettuce; pick them up and drown them in soapy water, collect them and feed them to chickens, throw them into your neighbor’s yard (unless you live next door to me), or squish them on sight

– Weed spotted spurge and purslane before they set seed; uproot and lay them on the ground upside down so they dessicate and decompose (but beware of purslane’s ability to root and regrow if it’s laid on moist soil)

– Note sun and shade patterns throughout the day; May through August patterns are about the same, in other words, you can grow a warm-season vegetable or a deciduous fruit tree in a spot that is sunny now but may be shady at other times of the year (north of a building, for example, like these pomegranates)

pomegranate north of building


You might also like to read:

You sure can grow long-day onions in Southern California

‘San Diego’ tomatoes, and supporting tomatoes

Chickens eat bugs in the garden

What to do in a Southern California garden in April

What to do in a Southern California garden in April

In April, my gardening mind is busy, as I suspect is yours. Mostly, I think about three topics. The first is fruit set — flowers becoming fruit on the trees. The above photo is the fruit set on my Blenheim apricot today; this tree is an over-achiever, year after year. A few of my other trees should take lessons . . . are you listening, Snow Queen nectarine?

And then I start thinking about irrigation this month too. It’s likely that we won’t get another real rain. Up ahead is about seven months of sunny and warm. I’ve always thought of growing food in Southern California as “just add water” because we have all of the sun we could want and none of the nasty weather (hail, high winds, flooding) that other places have in the summer. We just don’t get water from the sky during this time of year, so adding that is up to us.

April isn’t the month when a lot of watering is required, of course. But being the beginning of the irrigation season, it is the best, most forgiving time to fiddle with systems and dig down to test percolation and figure out schedules. On the other hand, doing this right before you’re about to leave on vacation in the summer would be the worst, least forgiving time. I think of time spent preparing irrigation now as doing my future self a favor.

And April begins open season on planting vegetables that like to grow through summer. It’s so exciting to now be able to freely sow and plant peppers, tomatoes, melons, eggplant and, well . . . here are the details on what we can sow, as well as other timely tasks out in your food garden in Southern California in April:

– Sow or plant vegetables: beets, carrots, basil, greens, tomatoes, tomatillos, sunflowers, squash, corn, beans, peppers, eggplant, cucumber, melons

– Eat vegetables (had you planted them): peas, broccoli, cauliflower, cabbage, brussels sprouts, greens, carrots, beets, lettuce, parsley, cilantro, spinach

– Eat fruit (if you have the trees): avocados (Hass, Fuerte, Pinkerton); citrus (Valencia, Gold Nugget mandarin, Pixie mandarin)

– Eat, eat, eat strawberries, and freeze, freeze, freeze the ones you don’t

strawberries in April

– Prune deciduous fruit trees with only a twist of your fingers; if you made a heading cut in the winter and new shoots are sprouting below it now, just remove any of those shoots that you don’t want by snapping them off with your hand — it’s really that easy

– Get excited about fruit set on deciduous fruit trees and, should you be so lucky, consider thinning some fruit; if a skinny branch has a lot of fruit toward its tip then it’s wise to remove some fruit there so the branch doesn’t break under the fruit’s weight (peaches or nectarines) or get sunburned as the branch bends down (apricots, plums, apples); that being said, don’t bother thinning much more than that

Flavor Grenade pluot fruit set

Flavor Grenade pluot fruit set; I will thin some, especially toward the tip

– Get up close and enjoy the smell of the citrus blossoms on the trees in your yard

– Cut off the water to garlic and onions that you planted last fall as they bulb out toward the end of the month; they can finish their lives on residual soil moisture, and they’ll be dry and easy to harvest when their leaves yellow and die sometime in May

– Get gophers before they get your plants; there are a lot of young ones under the ground this time of year, and the best way I’ve found to keep them under control is the Cinch Trap

– Set up new irrigation on plants, test run all irrigation lines to check for clogs and leaks, flush drip irrigation lines, clean out filters — get that irrigation dialed in


You might also like to read:

How long to run drip irrigation on vegetables

What to do in a Southern California garden in March

What to do in a Southern California garden in March

March is citrus month. Almost every kind of citrus tastes good in March in Southern California. While some are still ripe, others are already starting to taste sweet. What I mean is, some are wrapping up their seasons now, like navel oranges and blood oranges and Kishu mandarins, while others are in the early part of their seasons, like Valencia oranges and Gold Nugget mandarins.

Here is what we should all do: Go to a farmers market and taste every different kind of local citrus available. Do any knock your socks off? If you can get the variety name from the farmer, then go and buy a tree of that variety from a local nursery.

I did something similar a few years ago with a tour of the Citrus Variety Collection at U.C. Riverside, after which I planted a Cara Cara navel orange, Satsuma, Kishu, Gold Nugget, and Pixie mandarins. By the way, do you have children or grandchildren? You’ve got to give them the gift of a Kishu mandarin, which in my opinion is the best fruit tree for kids.

About vegetables, March is a month of transition. We can still plant some vegetables that like to grow in cool weather (think lettuce), but we can also start planting some vegetables that like to grow in warm weather (think corn).

To be specific about it, plant lettuce and its ilk as soon as possible, but be in no rush to plant corn and friends. I have found success sowing or planting those warm guys only toward the end of March.

With all of those ideas in mind, in March we can:

Sow and plant

– Sow or plant some cool-season vegetables: beets, carrots, greens, lettuce, green onions, peas, potatoes

– Sow or plant some warm-season vegetables: tomatoes, squash, corn, beans (some beans, but not all)

Not sow or plant: broccoli, cauliflower, Brussels sprouts, cabbage; sorry, it’s too late to get good production out of those

Harvest and eat

– Eat (had you planted them): asparagus, peas, broccoli, Brussels sprouts, cabbage, cauliflower, carrots, beets, lettuce, parsley, cilantro, spinach, celery, greens, strawberries

– Eat (if you have the trees): avocados (Hass, Fuerte, Pinkerton); citrus (almost all kinds)


– Collect or redirect any rain we get so it sinks into your yard near your plants and isn’t lost into the street

– Change irrigation on fruit trees as necessary (e.g. from drip lines to mini-sprinklers); do it now before the trees start depending on irrigation because the current mild weather and thoroughly moist soil from winter rains allow the tree roots to most easily adjust to new patterns of soil moisture

– Put in plants that are native to your neighborhood, especially in parts of your yard that are difficult to irrigate; I put wild lilac (Ceanothus) and monkey flowers (Diplacus) in a couple of Marches ago, watered them by hand a couple of times their first summer and haven’t watered them since, and they’re beautiful and blooming right now

– Observe your deciduous fruit trees as they bloom and leaf out; notice if they flower mostly on short branches (apples, cherries, apricots) or on long branches (peaches, nectarines), for this can guide your pruning next year — or now, because it’s never too late to prune

– Plant avocado trees, and prune them if necessary; you can grow your own avocados in a surprisingly small yard space

Avoid spraying anything on citrus trees if the new leaves get damaged by leafminers

– Plant more citrus, of course!