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, herbs, and flowers in raised beds, containers, or directly in the ground. Focus on warm-season crops and continue transitioning cool-season plants to avoid heat stress. This guide helps you optimize your garden for a productive spring and summer.
Plant now (quick list)
Tomatoes, Peppers, Eggplants, Basil, Zucchini, Cucumbers, Beans, Marigolds
Plant now
- Tomatoes
- Peppers
- Eggplants
- Basil
- Zucchini
- Cucumbers
- Beans
- Marigolds
- Sunflowers
Start indoors
- Melons
- Corn
- Okra
- Sweet potatoes (slips)
- Pumpkins
- Winter squash
- Herbs like dill and cilantro
Avoid
- Leafy greens (lettuce, spinach) as they bolt quickly
- Broccoli and cauliflower (heat sensitive)
- Peas (prefer cooler weather)
- Root crops like carrots (slow growth in warming soil)
- Overwatering newly planted warm-season crops
Next 2 weeks
- Harden off indoor seedlings before transplanting
- Mulch raised beds to conserve moisture
- Monitor for pests like aphids and caterpillars
- Thin seedlings to avoid overcrowding
- Begin regular feeding with balanced fertilizer
FAQs
Can I plant tomatoes directly in the ground in April in San Diego?
Yes, April’s warm soil temperatures in San Diego are suitable for transplanting tomatoes directly into raised beds or in-ground gardens.
How often should I water container plants during April?
Water containers daily or when the top inch of soil feels dry, as containers dry out faster than in-ground beds in San Diego’s mild spring.
Is it necessary to fertilize newly planted vegetables?
Yes, applying a balanced fertilizer at planting and periodically afterward supports healthy growth, especially in raised beds and containers.
What pests should I watch for in April?
Common pests include aphids, whiteflies, and caterpillars; inspect plants regularly and use organic controls if needed.
Can I grow leafy greens in April in San Diego?
Leafy greens tend to bolt quickly as temperatures rise, so it’s best to harvest early or avoid planting new crops this month.
Next steps
Get a personalized planting plan
Answer a few questions and generate a plan for your exact location and setup.
Build your garden shopping list
Get a starter kit checklist for what you want to grow (with optional links).
Ask the Gardener
Get quick answers and next-step guidance for your garden.
Want this page for a different city? Try the tool and enter your ZIP: Plant this month.