🍅 What to Plant
in August
August is the month of abundant harvest! Tomatoes, peppers, cucumbers and courgettes are overflowing. Process and preserve vegetables, dry herbs and prepare beds for autumn sowing. Start planning the autumn crop rotation.
🌿 Plant outdoors (autumn sowings)
August is the last chance for quick-maturing autumn crops. They will be ready before the first frosts in October.
Direct sow or transplant
Sow an autumn batch in August — ideal temperatures for germination. Ready to harvest in October.
Direct sow
Sow successionally from late August through September. Ready in 3–4 weeks. Better-flavoured in cooler weather than summer radishes.
Autumn sowing — ideal temperatures
August is ideal for rocket — it bolts in summer heat but grows perfectly in cooler autumn temperatures. Harvest continuously.
🍂 What to plant in August for a fall harvest
The key to August planting is simple maths: count the days between sowing and your average first frost date, then pick crops that mature inside that window. In Central Europe (zones 5–6) the first light frosts typically arrive in mid-October, which leaves roughly 60–75 growing days from early August. That is plenty for a whole second harvest — and warm August soil means seeds germinate in days, not weeks.
Fast crops that fit the window (days to maturity from sowing):
- →Radishes — 25–30 days. Sow every two weeks through early September for a continuous supply.
- →Spinach — 40–50 days. Sow from mid-August when soil starts to cool; young plants can even overwinter under fleece.
- →Lettuce — 45–55 days for heads, 30 days for baby-leaf. Choose autumn varieties that resist bolting.
- →Kale — 50–60 days. Frost actually improves the flavour — leaves get sweeter after the first freeze.
- →Turnips — 40–60 days. Sow in early August; harvest roots golf-ball to tennis-ball size for the best texture.
- →Bush beans — 50–60 days. Only for the first days of August — they must finish before any frost, which kills them outright.
Sow bush beans and turnips in the first week of August; radishes, lettuce and kale work until mid-month; spinach is happiest sown from mid-August onwards. If frost threatens early, a layer of garden fleece buys you 2–3 extra weeks — spinach, kale and radishes shrug off light frosts anyway. In milder regions or warm years with first frost in November, you can push all of these dates two weeks later.
🧺 Main August harvests
The garden is overflowing — keep harvesting regularly to keep plants productive and start preserving the surplus.
Harvest ripe fruits as they colour. Process surplus into passata, sauce or freeze. Remove lower yellowing leaves to improve airflow.
Harvest green or leave to ripen to red, yellow or orange. Red peppers have more vitamin C and flavour but take longer.
Keep harvesting regularly. Any cucumbers that turn yellow have been left too long — remove immediately to keep the plant productive.
Early plum varieties ripen in August. Process immediately — plums for traditional Czech povidla (plum butter) are the August highlight.
Harvest early pears slightly under-ripe — they ripen off the tree. Store in a cool place and check daily.
Collect ripe black elderberries for syrup or jam. Do not eat raw — cook before consuming. Rich in vitamins.
Early-season apple varieties ripen in August. They do not store long — eat fresh or make into juice and compote.
First chillies start ripening in August. Harvest progressively. Dry whole chillies in the oven or on a string.
🫙 August preserving tips
- →Tomatoes — passata, bottled whole, oven-dried, or freeze as sauce
- →Courgettes — slice and freeze (blanch first), or pickle in jars
- →Basil — blend with olive oil and freeze in ice cube trays, or make pesto
- →Herbs — dry or freeze for winter. Harvest before they flower
- →Chillies — dry whole in oven at 60°C overnight, or string and air-dry
💡 August gardening tips
- ✓Preserve the harvest — bottle, freeze and dry
- ✓Sow autumn lettuce, spinach and radishes
- ✓Harvest herbs for drying before they flower
- ✓Prepare autumn beds — add compost
⚠️ Common August mistakes
- ✗Leaving over-ripe vegetables on plants — it stops further production
- ✗Forgetting autumn sowings — August lettuce sowings will be ready to harvest in October
- ✗Stopping watering — plants still need water even in August
Frequently asked questions
What can I sow in August for an autumn harvest? ▼
In August you can sow: autumn lettuce (ready in 6–8 weeks), radishes (ready in 3–4 weeks), rocket (arugula) and spinach. These all love the warm soil of August and will mature before the first frosts in October.
How should I preserve the tomato glut in August? ▼
August is the time to preserve summer vegetables. Options for tomatoes: bottled (sterilised) whole tomatoes, tomato passata, tomato sauce, frozen (roast first for best results), dried (oven or dehydrator). Courgettes can be frozen (blanch first) or pickled. Basil can be frozen in olive oil or made into pesto.
When should I harvest plums in Czech Republic? ▼
Most plum varieties ripen in August and early September in Czech Republic. Plums for jam (povidla) are harvested in late August when fully ripe and sweet. Leave them on the tree as long as possible — they develop more sugar as they ripen. Early varieties ripen in late July.
Should I stop watering in August? ▼
No — plants still need regular watering in August. Tomatoes, cucumbers, courgettes and pumpkins are all still producing and need consistent moisture. Even in August, drought stress reduces yields significantly. Keep watering until crops are finished or until the end of the growing season.