How to Grow Concept
Lactuca sativa 'Concept'
Lactuca sativa 'Concept' is a reliable hybrid lettuce variety prized for its excellent heat tolerance and slow bolting rate. Gardeners grow it to enjoy fresh leaves throughout the season, from early spring cool air until late summer warmth.
📷 Wikimedia CommonsGrowing Guide
Prepare loose, well-draining soil with a pH between 6.0 and 7.0. As a cool-season crop, sow seeds or transplant seedlings 2 to 6 weeks before your last expected frost date. Press seeds gently into the soil at a depth of about one-quarter inch. Expect germination to occur within seven to ten days under consistent moisture. Space plants six to eight inches apart to ensure proper air circulation and head formation. While lettuce does not require trellising, keep the soil consistently moist with about one to one-and-a-half inches of water per week. Apply a light layer of mulch around the base to retain moisture and suppress weeds without touching the leaves. Watch for aphids, flea beetles, slugs, snails, leaf miners, downy mildew, lettuce drop, and bacterial leaf spot. Prevent issues by watering at the soil level, using row covers early in the season, and removing infected leaves immediately. Harvest outer leaves or whole heads when they reach maturity, typically fifty to sixty days after sowing.When to Plant Concept
Planting windows vary by USDA hardiness zone. Look up yours by ZIP code.
| Zone | Start Indoors | Direct Sow | Harvest |
|---|---|---|---|
| Zone 1 | June – July | July – September | |
| Zone 2 | May – July | July – September | |
| Zone 3 | May – June | June – October | |
| Zone 4 | April – June | June – October | |
| Zone 5 | April – May | June – November | |
| Zone 6 | April – May | May – November | |
| Zone 7 | March – May | May – November | |
| Zone 8 | March – April | April – December | |
| Zone 9 | February – March | March – December | |
| Zone 10 | January – March | March – December | |
| Zone 11 | January – February | February – December | |
| Zone 12 | January – February | February – December | |
| Zone 13 | January – February | February – December |
Companion Plants for Concept
✓ Good companions
Deep roots don't compete with shallow lettuce roots, helps loosen soil
Repels aphids and improves lettuce flavor and growth
Dill ↗Attracts beneficial insects like ladybugs and lacewings
Garlic ↗Natural pest deterrent, repels aphids and slugs
Repels nematodes and aphids, attracts beneficial insects
Acts as trap crop for aphids and cucumber beetles
Quick growth breaks up soil, deters flea beetles and aphids
Similar growing conditions and harvest times, efficient space usage
✗ Keep away from
Heavy feeder that competes for nutrients and may shade lettuce
Fennel ↗Inhibits growth of most garden plants through allelopathic compounds
Creates too much shade and competes heavily for water and nutrients
Nutrition Facts
Per 100g serving (USDA FoodData Central)
