Planting calendar
August Planting Guide for Philadelphia Gardens: Raised Beds, Containers, and In-Ground
In August, Philadelphia gardeners can focus on planting cool-season crops and preparing for fall harvests in raised beds, containers, and in-ground gardens. This is the ideal time to sow leafy greens, root vegetables, and herbs that thrive in cooler temperatures. Avoid heat-sensitive plants and start planning for fall protection as the season progresses.
Plant now (quick list)
Spinach, Lettuce, Radishes, Kale, Beets, Carrots, Swiss chard, Turnips
Plant now
- Spinach
- Lettuce
- Radishes
- Kale
- Beets
- Carrots
- Swiss chard
- Turnips
Start indoors
- Broccoli
- Cauliflower
- Cabbage
- Brussels sprouts
- Kohlrabi
Avoid
- Tomatoes (late plantings risk frost damage)
- Peppers
- Eggplants
- Corn
- Beans (avoid late sowing due to cooler weather)
Next 2 weeks
- Direct sow more cool-season crops like radishes and lettuce
- Thin seedlings to prevent overcrowding
- Begin applying mulch to conserve soil moisture
- Monitor for pests like aphids and caterpillars
- Water containers and raised beds deeply during heat spells
FAQs
Can I plant tomatoes in August in Philadelphia?
It's best to avoid planting tomatoes in August as they may not mature before the first frost. Focus on cool-season crops instead.
How do I protect my late summer crops from early frost?
Use row covers, cold frames, or cloches to shield plants during cold nights and extend the growing season.
Is it necessary to fertilize in August?
Applying a balanced fertilizer can support fall crops, especially leafy greens and root vegetables.
Can I start seeds indoors for fall transplanting?
Yes, starting broccoli, cabbage, and cauliflower indoors now allows for transplanting in early fall.
How often should I water raised beds and containers in August?
Water deeply 2-3 times per week, adjusting for rainfall and heat to keep soil consistently moist but not waterlogged.
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.