When should I plant leafy greens?
Most leafy greens prefer cool weather. Sow lettuce, spinach and kale as soon as the soil can be worked in spring, and again in late summer for fall. Chard tolerates more heat than lettuce or spinach.
Heat and long days trigger bolting, when plants send up flower stalks and leaves turn bitter. Check your extension office for local frost dates and plan crops to finish before summer heat. Keep a note of the date each sowing went in, so next year you can repeat what worked and adjust what did not.
Leafy greens can be grown in small spaces, in containers or in the shade of taller crops. A shallow box on a patio can supply salad for a family, which makes greens a good first crop for anyone with limited ground.
Which greens fit which conditions?
Lettuce and spinach are fastest but the most heat sensitive. Kale and collards handle cold and light frost and often taste sweeter after cool nights. Chard keeps producing through warm weather.
Choose several types so something is always ready, and look for varieties labeled as slow to bolt for warmer areas.
Seeds that need light to germinate should be barely covered. Check the packet, since lettuce is sensitive to burying too deep, while kale and chard seed can go a bit deeper.
- Lettuce: fast, cool-season
- Spinach: cold tolerant, bolts early
- Kale: hardy, long season
- Chard: handles more heat
How do I sow and space them?
Many greens have small seeds that need a fine, firm seedbed and light covering. Keep the surface evenly moist until they sprout. Thin to the spacing on the packet, since crowded plants stay small and invite disease.
Thinnings can often be eaten as baby greens. Sow short rows every couple of weeks, which is called succession sowing, so you do not have everything ready at once.
Season extension helps. Row cover or a cold frame can protect greens from hard frost and let you harvest weeks later in fall, or start earlier in spring. Ask your extension office which crops hold up best in your winters.
- Sow short rows every two weeks
- Thin to packet spacing
- Keep the surface evenly moist
- Shade in hot weather
- Harvest in the cool morning
How much water and feeding do greens need?
Greens are mostly water, and shallow roots dry out fast. Keep soil evenly moist and mulch lightly once plants are up. Water in the morning so leaves dry quickly.
Leafy crops respond to nitrogen, but too much can build up in leaves. Use a soil test and the label to guide feeding, and avoid fresh manure close to harvest.
Plan your picking. Cut leaves before they get large and tough, and harvest a little from many plants rather than stripping a few. Regular harvest keeps most greens growing and productive.
- Water at the base in the morning
- Mulch lightly once up
- Feed based on soil test
- Avoid fresh manure near harvest
How do I keep greens from bolting or bitter leaves?
Plant early, choose bolt-resistant varieties and keep plants watered. Shade cloth or planting in the shade of taller crops can cool greens in warm weather. Harvest before plants send up stalks.
Once a plant bolts, leaves usually turn bitter. Pull it and replant a heat-tolerant crop, or start a fall sowing.
Rotate where greens grow each year and remove old plants after harvest. Leaving bolted or diseased plants in the bed gives pests and diseases a place to overwinter.
What pests and diseases are common?
Aphids, slugs, flea beetles and leaf miners chew and damage greens. Row cover keeps many pests off from the start. Look under leaves often and remove problem leaves.
Wet leaves invite fungal disease, so give plants airflow and avoid overhead watering late in the day. Rotate where greens grow each year.
- Aphids on new growth
- Slug damage on leaves
- Tiny holes from flea beetles
- Winding tunnels from leaf miners
How do I harvest and handle greens safely?
For loose-leaf types, cut outer leaves and leave the center to keep growing. For heads, cut at the base when firm. Harvest in the cool morning when leaves are crisp.
Wash greens in clean running water before eating, and refrigerate promptly. Keep animal manure and compost away from leaves, and ask your extension office or public health office about safe handling of produce grown in the garden. Greens that look fine can still carry soil, so rinse them well even when you grew them yourself.
Key takeaways
- Plant early and again in late summer
- Succession sow small amounts
- Keep soil evenly moist
- Cut outer leaves to keep plants producing
Sources and further reading
Last reviewed: November 12, 2026. Written by the Homestead & Small Farm Editorial Team. See our editorial policy.