Planting calendar
August Planting Guide for San Francisco Gardens: Raised Beds, Containers, and In-Ground
August in San Francisco offers mild temperatures ideal for planting cool-season crops in raised beds, containers, and in-ground gardens. Focus on leafy greens, root vegetables, and herbs that thrive in cooler weather. Start preparing for fall harvests by planting now and starting seeds indoors for transplanting later.
Plant now (quick list)
kale, spinach, lettuce, radishes, carrots, beets, broccoli, cauliflower
Plant now
- kale
- spinach
- lettuce
- radishes
- carrots
- beets
- broccoli
- cauliflower
- cilantro
- parsley
Start indoors
- broccoli
- cauliflower
- cabbage
- lettuce
- kale
- brussels sprouts
- chard
- celery
- onion sets
- herbs (basil, dill)
Avoid
- tomatoes (due to heat stress)
- peppers
- eggplants
- beans
- corn
- summer squash
- melons
- cucumbers
- basil (outdoor direct sowing)
- potatoes (late planting risks)
Next 2 weeks
- transplant indoor-started brassicas to garden
- thin seedlings of carrots and beets
- mulch around plants to retain moisture
- water early in the day to reduce fungal risks
- monitor for pests like aphids and caterpillars
- start succession planting of leafy greens
- prune summer herbs to encourage new growth
- prepare soil with compost for fall crops
- avoid heavy fertilization on leafy greens
- keep containers well-watered as temperatures vary
FAQs
Can I plant tomatoes in August in San Francisco?
August is generally too warm for planting tomatoes in San Francisco; they may suffer heat stress and poor fruit set. It's better to wait until early spring or start indoors for a fall crop.
How often should I water raised beds in August?
Water raised beds deeply about 2-3 times per week, adjusting based on rainfall and temperature. Early morning watering helps reduce evaporation and disease risk.
What are the best herbs to grow in containers during August?
Parsley, cilantro, chives, and mint do well in containers during August, benefiting from partial shade and consistent moisture.
Is it necessary to start seeds indoors for fall crops?
Starting seeds indoors for brassicas and leafy greens helps ensure strong seedlings ready for transplanting, extending your harvest season.
How can I protect my garden from pests in late summer?
Regularly inspect plants for aphids, caterpillars, and other pests, use organic insecticidal soaps if needed, and encourage beneficial insects like ladybugs.
Next steps
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