My Southern California Seed Schedule- Zone 10b
Zone 10b is a special climate. Our winters are extremely mild, so most advice on seed packets or online doesn’t really pertain to us. Before following this guide, check your USDA gardening zone here.
If we are in different zones, you could use this guide as a general outline and adjust accordingly (applicable down to zone 9 with some exceptions).
If I have a grow guide for a specific vegetable or flower available on my website, I have made the name a clickable link so you can view the growing guide. Happy gardening!
Direct Sow vs. Containers
I do a mix of direct sowing and transplanting in my garden. This might be different for each garden and gardener. The decision of whether or not to direct sow is really based on your garden and if you have pest problems, etc. I encourage you to read Direct Sowing Versus Transplanting for more insight and helpful tips on making this decision.
This guide is for when I start seeds. If you are buying transplants at a nursery you can estimate another month or so out (for example, sow seeds in May but transplant in June/July).
READ my guide to seed starting HERE.
When do I transplant my container-grown seedlings? This guide is for starting from seed. Starting your seeds in pots or pellets can give you a head start on growing without taking up room in the garden. The time to transplant varies from plant to plant…also with how much room you have in the garden. You’ll watch them outgrow their pots, and decide if it is time to put in the garden or transfer to a larger pot.
Where to put my seedlings while growing? : If starting for Spring, it is usually best to start your seeds indoors or in a greenhouse. Sometimes the weather cooperates and I can start my seeds outdoors during the day and then bring them indoors for shelter at night. If starting any other time of year where it is generally warm outside, the ideal place to raise seedlings is in a partially shaded area, outdoors, with NO hot afternoon sun. If birds or pests are going to be a problem, you can start them in a sunny windowsill indoors until they are more established or cover the seedlings with screen or mesh.
2022 update: I actually used an indoor grow light setup for the first time this Winter/Spring! If you want to see it, check out my Garage Seed Starting Setup
Where can I buy high-quality seeds? See my list of seed sources
January
Bare root planting! Visions in my head of climbing roses and delicate fruit blossoms! January can be one of our coolest months of the entire year which means it is perfect for getting outside and doing some pretty strenuous garden tasks (remember, zone 10b doesn’t really freeze or get snow). For all us Southern California gardeners, it’s time to plant your bare root trees and shrubs. It’s also time for pruning your existing fruit trees. I truly enjoy gardening this time of year. In fact, back in 2016, this was the month that we built our very first raised bed garden. Cheers to a new year!
Herbs/alliums
dill
cilantro
chives
fennel
Flowers
poppies
calendula
pansies
stock
nasturtiums
cornflower
Herbs/alliums
dill
cilantro
Flowers
poppies
calendula
pansies
stock
cornflower
nasturtiums
celery
cucumbers
runner beans
Herbs/alliums
parsley
basil
shiso
most herbs
Flowers
nasturtiums
scabiosa
cosmos
marigold
various everlastings
April
Depending on weather, April might be more ideal than March for starting those heat-loving summer vegetables. As always, pay attention to weather predictions and plant accordingly.
May
May is a great time to catch up on sowing any plants you realize you forgot! It’s also nice and warm for direct sowing a lot of heat loving vegetables, like the ones on this list HERE.
June
June is a beautiful time in the garden—quite possibly the most beautiful. Everything is growing. The sweet peas are on their last flush, the roses have graced the garden with their perfume, and the summer vegetables are truly teasing us with anticipation. It’s easy to get distracted and stop sowing seeds. While I don’t consider this month a major seed sowing month, I do like to keep up on my succession sowing or quickly start any vegetables I might have forgotten.
Flowers
August
You are probably thinking ‘it’s too early to be starting any cool season crops!’ Well, let me share my experience from previous years: I used to start most of my Fall seeds on Labor Day weekend—things like heading brassicas, sweet peas, artichokes, etc. Overall, that turned out to be excellent timing for everything EXCEPT my broccoli, romanesco, and cauliflower.
Brassicas that form heads need a period of cold to grow properly. The idea is to get the plants big enough that, by the time cold hits our zone, they will be ready to form beautiful heads! Therefore, I like to start those vegetables in August.
August
veggies:
*note: stagger seed starting for these crops. Not all at once.
broccoli (mid-late august)
cauliflower (mid-late august)
romanesco (mid-late august)
cabbage
brussel sprouts
celeriac
flowers:
possibly zinnias and sunflowers
stock
snapdragons
sweet peas
Herbs:
parsley
basil
You can use this opportunity to start some “second wave” summer plants. Since our summer temps last well into October, many of these plants will still be able to produce.
◊Don’t forget to purchase your seed garlic!
September
We have made it! This is the major push for starting cool season crops from seed. Last year I started peas of all kinds, leeks, calendula, asian greens, kale, cabbages, and lettuces (only ones that form heads) at this time and was so pleased with the results. In fact, the only thing I would change is to start MORE. I had forgotten some vital veggies like bok choy.
September
Broccoli
Cauliflower
Romanesco
Late September *if cool enough
veggies:
onions
napa cabbage
various asian greens
ALL cabbages
various peas (both shelling & snap) *or wait one more month
kale
bok choy
heading lettuces (romaine, lolla rossa, salanova)* if cool enough
flowers:
snapdragons
scabiosa
cornflowers (bachelor button)
sweet pea flowers *transplant in october
chamomile *started September 26th, did well.
stock
pansies
herbs:
cilantro
dill
parsley
chives
CHECK OUT my Fall & Winter Gardening Guide
Refer to September’s list plus…
Fava beans
Garlic-please see my information on planting and growing garlic in our climate.
Sow anything on the list from September (especially if September was too hot).
Around this time it is cool enough to start succession sowing carrots, radishes, beets, turnips, etc. *Refer to my Succession Sowing Interval Chart in the Garden Resources Library for subscribers and read How to Succession Plant to Maxmimize Your Harvests.
October 20, 2020 I planted out ranunculus corms, daffodil bulbs, and anemone corms undeground. They bloomed beautifully! Get the guide -> HERE.
Fall sow poppy seeds for early Spring bloom.
November
This is when I usually heave a sigh of relief. There is no more major seed starting, the garlic is in the ground, and the weather starts to cool down. We are well on our way to being able to sit back and enjoy the Winter garden. As things slow down, I start to let my imagination run wild—dreaming of next Spring’s garden plans.
November is the month of direct sowing. *remember my notes on direct sowing above*
Continue to sow these items as needed:
radishes
kohlrabi
beets
turnips
salad mixes
*Don’t forget to refer to my succession sowing interval chart in the Garden Resources Library.
bok choy
joi choi
any greens you love
Transplant leeks and onions starts into the garden
Planting flower bulbs (daffodils, ranunculus, anemones, tulips) now will let them have some time underground to chill before coming to life in Spring. *bulbs tend not to perform well in zone 10b but I still plant some. You can try putting tulip bulbs in the fridge 4 weeks before planting to help trick them into thinking Winter has passed.
December
Last December brought some refreshing rain. One of my favorite things to do is watch all the delicious greens dripping in raindrops. This time of year I usually start immersing myself in seed catalogs and planning the Spring garden. Most of the gardening tasks involve cleaning and ordering. Last year I did start my pansies inside during this month, and they performed so well for Spring that I decided I would do it again.
Things to do in garden:
Spring garden planning & layout
Read Things to Consider When Buying a Fruit Tree and look at local nurseries for bare root fruit trees and roses. It’s time!