Romaine Lettuce
Lactuca sativa var. longifolia
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Romaine lettuce produces tall, crisp heads with sturdy leaves perfect for Caesar salads. More heat-tolerant than other lettuces, it grows well in containers for extended spring and fall harvests.
Soil Requirements
Rich, moisture-retaining potting mix. pH 6.0-7.0.
Temperature Range
45-75°F (7-24°C). Cool-season crop. More heat-tolerant than other lettuces.
Fertilizer Needs
Moderate feeder. Apply balanced liquid fertilizer every 2-3 weeks.
Quick Growing Tips
- Sturdy, upright leaves
- More heat-tolerant than other lettuces
- Harvest outer leaves or whole head
- Classic Caesar salad lettuce
- Hearts form in cool weather
Growing Details
Harvest Tips
Cut outer leaves or harvest whole head. Hearts are ready when center feels firm.
Companion Planting
Plant with:
Avoid planting with:
Common Problems & Solutions
- Bolting in heat
- Aphids
- Tipburn in hot weather
Great Companion Plants
Related Guides & Resources
Frequently Asked Questions
How much light does Romaine Lettuce need?
Romaine Lettuce requires partial sun (3-6 hours of sunlight).
What size container do I need for Romaine Lettuce?
Romaine Lettuce needs a minimum of 6 inch pot. Larger containers provide better moisture retention and root development.
How long until I can harvest Romaine Lettuce?
Romaine Lettuce typically takes 65 days from planting to harvest.
What are common problems with Romaine Lettuce?
Common problems include: Bolting in heat, Aphids, Tipburn in hot weather.
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