Planting calendar
April Planting Guide for San Diego Gardens: Raised Beds, Containers & In-Ground
April in San Diego offers ideal mild temperatures for planting a variety of vegetables and herbs in raised beds, containers, and in-ground gardens. Focus on warm-season crops and transplant seedlings started indoors earlier this year. Avoid frost-sensitive plants early in the month and prepare for consistent growth as the weather stabilizes.
Plant now (quick list)
Tomatoes, Peppers, Eggplants, Basil, Zucchini, Cucumbers, Green beans, Swiss chard
Plant now
- Tomatoes
- Peppers
- Eggplants
- Basil
- Zucchini
- Cucumbers
- Green beans
- Swiss chard
- Carrots
- Lettuce
Start indoors
- Melons
- Corn
- Pumpkins
- Squash
- Okra
- Sweet potatoes
- Herbs like dill and cilantro
- Sunflowers
- Chili peppers
- Tomatillos
Avoid
- Broccoli
- Cauliflower
- Cabbage
- Brussels sprouts
- Kale
- Spinach
- Peas
- Lettuce (late April heat may bolt)
- Potatoes
- Radishes
Next 2 weeks
- Transplant tomato and pepper seedlings outdoors
- Mulch raised beds to conserve moisture
- Begin regular watering schedule for warm-season crops
- Watch for pests like aphids and caterpillars
- Thin seedlings in containers for better growth
- Fertilize with balanced organic fertilizer
- Stake or cage tall plants like tomatoes
- Harvest early crops like lettuce and radishes
- Prepare soil for late-season crops
- Monitor soil moisture in containers closely
FAQs
Can I plant tomatoes directly in the ground in April?
Yes, April is a great time to transplant tomato seedlings into the ground in San Diego, as the risk of frost is minimal and temperatures are warming.
How often should I water container plants in April?
Water container plants every 1-2 days, as they dry out faster than in-ground gardens, especially with rising temperatures.
Is it too late to start lettuce in April?
Lettuce can be planted in early April, but avoid late April as warmer weather may cause it to bolt quickly.
What pest problems should I watch for in April?
Common pests include aphids, caterpillars, and whiteflies; inspect plants regularly and use organic controls if needed.
Should I fertilize my raised beds this month?
Yes, applying a balanced organic fertilizer in April supports vigorous growth for warm-season vegetables.
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