Planting calendar
August Planting Guide for Philadelphia Gardens: Raised Beds, Containers & In-Ground
In August in Philadelphia, focus on planting cool-season crops that will mature before the first frost. This is a great time to sow leafy greens, root vegetables, and herbs in raised beds, containers, or directly in the ground. Start planning for fall harvests by planting now and starting some seeds indoors for transplanting later.
Plant now (quick list)
spinach, lettuce, kale, radishes, carrots, beets, turnips, collard greens
Plant now
- spinach
- lettuce
- kale
- radishes
- carrots
- beets
- turnips
- collard greens
- cilantro
- chard
Start indoors
- broccoli
- cauliflower
- cabbage
- brussels sprouts
- kohlrabi
- lettuce
- spinach
- parsley
- dill
- celery
Avoid
- tomatoes
- peppers
- eggplants
- beans
- corn
- cucumbers
- squash
- melons
- sweet potatoes
- basil
Next 2 weeks
- direct sow radishes for quick harvest
- transplant seedlings of broccoli and cabbage
- mulch raised beds to retain moisture
- water containers early in the day
- thin seedlings of carrots and beets
- monitor for pests like aphids and caterpillars
- start planning cover crops for winter soil health
- fertilize leafy greens lightly
- harvest herbs regularly to encourage growth
- remove any diseased or yellowing leaves
FAQs
Can I plant tomatoes in August in Philadelphia?
It's best to avoid planting tomatoes in August as they require a longer growing season and warm temperatures, which are declining. Focus on cool-season crops instead.
How soon will leafy greens planted in August be ready to harvest?
Leafy greens like spinach and lettuce typically mature within 30 to 45 days when planted in August, allowing harvest before the first frost.
Is it necessary to start seeds indoors in August?
Starting seeds indoors for brassicas like broccoli and cabbage in August helps ensure strong seedlings ready to transplant for a fall harvest.
How do I protect my August plantings from early frost?
Use row covers, cold frames, or mulch to protect young plants from early frost and extend your growing season.
Can I reuse soil from summer crops for fall planting?
It's best to amend soil with compost and remove plant debris before fall planting to reduce disease risk and replenish nutrients.
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