What to plant this week in San Diego, CA
San Diego's mild, frost-free climate means there is no rush to wait for spring; this week is the perfect time to sow heat-loving staples like cucumber and okra directly into your garden beds. With temperatures hovering around 40°F minimums but rarely dropping lower, you can focus entirely on establishing summer crops and harvesting early yields like basil and sweet corn.
The next 7 days
San Diego, CAGrowing in San Diego right now
- San Diego's coastal fog often brings cooler nights in winter months, so prioritize sun-exposed microclimates for cold-sensitive starts like Thai Basil and Malabar Spinach to ensure rapid growth.
- Our sandy, fast-draining soils require consistent moisture retention; add organic mulch heavily around newly sown Zinnias and Yellow Summer Squash to prevent rapid evaporation under the midday sun.
- Be mindful of salt spray if you garden near the coast; rinse ornamental flowers like French Marigolds and Vinca periodically to remove accumulated saline residues that can stunt growth.
Sow this week
13 crops- Basil
- Cleome (Spider Flower)
- Cucumber
- French Marigold
- Malabar Spinach
- Nasturtium
- Okra
- Shiso (Japanese Basil)
- Thai Basil
- Vinca (Madagascar Periwinkle)
- Yellow Summer Squash
- Zinnia
- Zucchini
Transplant this week
Nothing is due to go out this week.
Harvest soon
24 crops- Basil
- Cantaloupe
- Cleome (Spider Flower)
- Cosmos
- Cowpea (Black-Eyed Pea)
- Cucumber
- French Marigold
- Garden Verbena
- Gourd (Ornamental/Bottle)
- Honeydew Melon
- Loofah (Luffa)
- Malabar Spinach
- Nasturtium
- Okra
- Roselle (Cranberry Hibiscus)
- Shiso (Japanese Basil)
- Sunflower
- Sweet Corn
- Thai Basil
- Vinca (Madagascar Periwinkle)
- Watermelon
- Yellow Summer Squash
- Zinnia
- Zucchini
Seasonal tips
- Succession sow Malabar Spinach or Shiso every two weeks for a continuous harvest of tender leaves.
- Pinch back the tops of growing cucumbers and yellow summer squash to encourage bushier plants and more fruit.
- Deadhead spent Zinnia blooms regularly to keep flowers vibrant and promote new bud formation.
Pest & disease watch
- Watch closely for spider mites on Cleome (Spider Flower) and Shiso, as the dry summer air often triggers early infestations before heavy rains arrive.
- Root aphids frequently target young Sweet Corn and Sunflower seedlings in our sandy soil, requiring regular inspection of lower leaves.
Watering this week
Water deeply in the morning to keep soil moist without promoting fungal issues on warm-season crops.
Harvest sweet corn when the kernels are milky but not yet hard, ensuring maximum sweetness right at the break of dawn.
San Diego gardening questions
3When is the best time to plant Malabar Spinach this week?
You can sow Malabar Spinach directly into the ground now since San Diego's frost-free zone allows for immediate germination. Keep the soil consistently moist until seedlings emerge, as they prefer cool mornings even in our generally warm climate.
My basil is growing slowly; should I transplant it or keep sowing outdoors?
Continue sowing new Basil seeds directly where you want them to grow, as transplants are unnecessary and can shock the plant. Harvest outer leaves regularly to encourage bushy growth that withstands our coastal winds better than sparse seedlings.
Are there any vegetables I should harvest immediately from my current garden?
Check your Sweet Corn and Zucchini plants today, as they are listed for immediate harvest this week in San Diego. Pulling these before the midday heat sets in will ensure maximum sweetness and fruit size.
Other cities in zone 11a
2See the full zone 11a guide → · Plan your San Diego garden in SproutGuide →