Planting calendar
August Planting Guide for San Jose, CA: Raised Beds, Containers & In-Ground Gardens
In August, San Jose gardeners can focus on planting heat-tolerant vegetables and starting fall crops in raised beds, containers, and in-ground gardens. This is an ideal time to plant warm-season vegetables for late summer harvest and begin seeds indoors for cooler fall weather.
Plant now (quick list)
Tomatoes, Peppers, Eggplants, Basil, Okra, Bush beans, Summer squash, Melons
Plant now
- Tomatoes
- Peppers
- Eggplants
- Basil
- Okra
- Bush beans
- Summer squash
- Melons
- Corn
- Cucumbers
Start indoors
- Broccoli
- Cauliflower
- Cabbage
- Kale
- Lettuce
- Spinach
- Brussels sprouts
- Collard greens
Avoid
- Peas
- Potatoes
- Carrots
- Beets
- Radishes
- Cool-season leafy greens outdoors
- Brassicas outdoors
- Root crops in hot soil
- Newly planted seeds exposed to midday heat
- Water-intensive crops during dry spells
Next 2 weeks
- Transplant indoor-started brassicas to garden after hardening off
- Mulch raised beds and containers to retain moisture
- Continue watering deeply in the mornings
- Watch for pests like aphids and caterpillars
- Begin succession planting bush beans and squash
- Fertilize tomatoes and peppers lightly
- Prune tomato suckers to improve airflow
- Harvest mature summer crops regularly
- Prepare soil for fall root crops
- Check container drainage to prevent root rot
FAQs
Can I plant cool-season crops directly in August in San Jose?
August is generally too warm for direct sowing cool-season crops outdoors; start them indoors and transplant in early fall when temperatures drop.
How often should I water raised beds and containers in August?
Water deeply every 2-3 days, adjusting for heat and soil moisture; containers may require daily watering during hot spells.
Is it safe to plant tomatoes in August?
Yes, tomatoes can be planted now for a late summer to early fall harvest, especially in containers or raised beds with good sun and water.
What pests should I watch for in August?
Common pests include aphids, whiteflies, and caterpillars; inspect plants regularly and use organic controls if needed.
Should I fertilize my garden in August?
Light fertilization supports fruiting vegetables like tomatoes and peppers, but avoid heavy feeding that encourages leafy growth during heat.
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