Romaine Growing Guide

All you need to know to grow successfully!

Plant Family:
Plant Type:

Square Foot Spacing:

Typical Season:
Typical Zones Grown In:
3, 4, 5, 6, 7, 8, 9, 10, 11
Growing Difficulty:

Romaine, also known as cos lettuce, is a type of lettuce that is commonly used in salads and sandwiches. It is a member of the lettuce family and is known for its long, crisp leaves that have a slightly sweet and nutty flavour. Romaine lettuce is high in nutrients such as vitamin A, vitamin K, and folate, making it a healthy addition to any diet. It is a cool-weather crop that grows best in well-drained soil and prefers full sun to partial shade. Romaine lettuce is easy to grow and can be grown in a variety of conditions, making it a popular choice for home gardeners.

How to Grow Romaine Organically

  1. Choose a planting site: Romaine lettuce grows best in well-drained soil that is rich in organic matter. It prefers full sun, but can also tolerate partial shade.
  2. Prepare the soil: Amend the soil with compost or other organic matter to improve fertility and drainage. Romaine lettuce prefers slightly alkaline soil with a pH between 6.0 and 7.0.
  3. Plant the seeds: Sow the romaine lettuce seeds directly into the garden bed in early spring, after the last frost. Plant the seeds about 1/4 to 1/2 inch deep and 6-8 inches apart. Cover the seeds with soil and water gently.
  4. Water the plants: Romaine lettuce needs consistent moisture to grow well. Water the plants regularly, especially during dry periods.
  5. Thin the plants: When the seedlings are a few inches tall, thin them to a spacing of about 12-18 inches apart. This will give the plants room to grow and reduce competition for resources.
  6. Fertilize the plants: Romaine lettuce benefits from regular applications of nitrogen-rich fertilizer, such as compost tea or fish emulsion. Apply the fertilizer according to package instructions.
  7. Harvest the leaves: Romaine lettuce can be harvested as soon as the leaves are large enough to use, or you can wait until the heads are fully formed. Cut the leaves or heads at the base of the plant with a sharp knife or scissors. Leave the lower leaves on the plant so that it can continue to grow.

By following these basic steps, you can grow your own romaine lettuce and enjoy its crisp, refreshing leaves in salads, sandwiches, and other dishes. Romaine lettuce is a versatile and nutritious vegetable that is a great addition to any home garden.

Planting Guidelines

The following are general guides to follow. However, nothing is set in stone. Feel free to experiment!

How to Start:
When to Direct Sow:
March, April, May, June, July, August, September, October
When to Start Indoors:
March , April , May
Sprouting Time:
2-3 Weeks

Ideal Temperature (C):

1/2 inch
Spacing (cm):
15 cm
Row Spacing (cm):
10-12 inches
Sun Exposure:
Part Shade
Maturity Time:
2-3 Months
When To Harvest:
April, May, June, July, August, September, October
How to Harvest:
Cut Outer Leaves, Allow Inner Leaves to Grow

Health Benefits

Growing your own food is one of the best things you can do for your health. Let’s check out some of the health benefits!

Is It Edible?
Edible Parts:
Potential Health Benefits:
Vitamin A, Vitamin K, Folate

Tips to Growing Organically

Growing without the use of pesticides and herbicides is easier than you may think and it’s better for the environment!

Companion Plants:
Radish, Spinach
What Plants to Avoid:
Common Pests:
Aphids, Slugs, Caterpillars
Common Disease:
Powdery Mildew, Downy Mildew, Root Rot
Bonus Grow Tips:
Plant in cooler weather, harvest leaves when they are young

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