How to Grow Oak Leaf
Lactuca sativa 'Oak Leaf'
Lactuca sativa 'Oak Leaf' is a popular heirloom lettuce variety prized for its distinctive oak leaf-shaped heads and reliable performance in cool weather. Gardeners cultivate it for its ease of growth, excellent heat tolerance that delays bolting, and moderate resistance to common diseases.
📷 Wikipedia: LettuceStarting Oak Leaf: indoors or direct sow?
🏠 Start indoors 4 weeks before your last spring frost, then move the seedlings outside.
While this lettuce tolerates direct sowing two to six weeks before frost, seedlings started indoors should be hardened off and moved outdoors during that same window once the risk of hard freezes passes.
Soil, care & harvest
Prepare your soil by ensuring the pH falls between 6.0 and 7.0 with good drainage. As a cool-season crop, sow seeds directly outdoors or start indoors two to six weeks before your last spring frost date. Press seeds lightly into the soil at a depth of about one-quarter inch, then keep the medium moist until germination occurs within seven to ten days.
Space seedlings eight to ten inches apart once they are established to ensure proper air circulation and head formation. Provide one inch of water per week, maintaining consistent moisture without letting the soil dry out completely. Apply a light layer of mulch around the base to retain humidity and suppress weeds, feeding only if growth appears sluggish.
Watch for aphids, slugs, snails, leaf miners, downy mildew, lettuce drop, and white rust; control pests manually or with organic sprays while ensuring good airflow to prevent fungal issues. Harvest leaves or whole heads when the plant reaches maturity in forty-five to fifty days after sowing.
When to Plant Oak Leaf
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 Oak Leaf
✓ Good companions
Deep roots don't compete with shallow lettuce roots and help break up soil
Repels aphids and other soft-bodied insects that commonly attack lettuce
Attracts beneficial insects like ladybugs and parasitic wasps that control aphids
Natural fungicide properties help prevent lettuce diseases like downy mildew
Deters nematodes and aphids while attracting beneficial predatory insects
Acts as trap crop for aphids and cucumber beetles, drawing pests away from lettuce
Quick-growing companion that helps break up soil and deters flea beetles
Similar growing requirements and can be succession planted together
✗ Keep away from
Heavy feeder that competes for nutrients and can shade out lettuce
Releases allelopathic compounds that inhibit lettuce germination and growth
Allelopathic effects and excessive shading can stunt lettuce growth
Nutrition Facts
Per 100g serving (USDA FoodData Central)
