Lettuce, Spinach & Arugula Seeds

Lettuce, Spinach & Arugula Seeds

Fresh, nutrient-dense, and incredibly easy to grow, lettuce, spinach, and arugula are among the most rewarding vegetables for Canadian home gardeners. These cool-season greens grow quickly, thrive in spring and fall conditions, and provide continuous harvests of tender leaves packed with vitamins, minerals, and antioxidants. Whether you're planting crisp romaine lettuce, nutrient-rich spinach, or peppery arugula, this collection makes it easy to grow fresh salad greens at home.

Because lettuce, spinach, and arugula mature quickly, they're ideal for succession planting. By sowing new seeds every few weeks, gardeners can enjoy fresh harvests throughout the growing season rather than harvesting everything at once. For a broader garden plan, explore our Vegetable Seeds collection for other cool-season and warm-season crops.

Why Grow Lettuce, Spinach, and Arugula?

Leafy greens consistently rank among the most nutrient-dense vegetables available. Research from the CDC ranked spinach among the most nutrient-dense commonly consumed vegetables thanks to its high concentration of vitamins, minerals, and antioxidants.

Lettuce varieties provide vitamin A, vitamin K, folate, and hydration due to their high water content. Spinach supplies iron, magnesium, potassium, vitamin C, and antioxidants such as lutein and zeaxanthin. Arugula contains glucosinolates, naturally occurring plant compounds also found in broccoli and other cruciferous vegetables that have been widely studied for their health-promoting properties.

Health Benefits of Arugula

Arugula is often overlooked beside lettuce and spinach, but it's one of the most nutrient-rich leafy greens you can grow. It contains vitamin K, vitamin A, folate, calcium, and beneficial glucosinolates. Its distinctive peppery flavor adds depth to salads, sandwiches, pizzas, and pasta dishes while providing nutritional diversity beyond traditional salad greens.

Arugula is also one of the fastest-growing greens in the garden, often reaching harvest size in as little as 30 to 40 days. Its quick growth and ability to tolerate cooler temperatures make it an excellent companion crop alongside lettuce and spinach. Start with Arugula Seeds - Bellezia (Organic) if you want a fast-growing, peppery green for salads and cut-and-come-again harvests.

How to Grow Lettuce, Spinach, and Arugula From Seed

Lettuce, spinach, and arugula are typically direct sown outdoors in early spring and again in late summer for fall harvests. All three crops prefer cooler temperatures and may bolt during extended periods of summer heat.

  • Sow seeds approximately ¼ inch deep.
  • Plant in loose, fertile, well-draining soil.
  • Keep soil consistently moist during germination.
  • Thin seedlings to allow proper airflow and leaf development.
  • Provide full sun to partial shade depending on your climate.
  • Sow new seeds every 2–3 weeks for continuous harvests.

Spinach is especially reliable in cool conditions. For a productive leafy green option, see Spinach - Big Leaf Vancouver Variety.

Best Fertilizer for Lettuce, Spinach, and Arugula

Leafy greens benefit from nitrogen-rich soil because nitrogen directly supports leaf growth. Before planting, work compost or well-aged organic matter into the soil. During the growing season, an organic fertilizer formulated for leafy vegetables can help maintain steady growth.

For best results, avoid excessive phosphorus-heavy fertilizers and focus on balanced organic fertilizers that support healthy foliage production. Consistent watering and fertile soil are often more important than aggressive fertilization when growing leafy greens. If you're growing in smaller spaces, many greens also perform well with crops from our Container Garden Compact Plants collection.

How to Harvest Lettuce, Spinach, and Arugula

One of the biggest advantages of growing leafy greens is the ability to harvest repeatedly from the same planting.

Lettuce: Harvest outer leaves as needed or cut entire heads once mature.

Spinach: Pick outer leaves regularly to encourage continued production.

Arugula: Harvest young leaves for a milder flavor or allow leaves to mature for a stronger peppery taste.

The "cut-and-come-again" harvesting method allows gardeners to enjoy multiple harvests from a single planting before plants eventually bolt and go to seed. For more growing help, see our small-space gardening guide.

Frequently Asked Questions

Can I grow lettuce and spinach together?

Yes. Lettuce and spinach have very similar growing requirements and are excellent companion plants. Both prefer cool weather, consistent moisture, and fertile soil, making them ideal for growing in the same garden bed.

What is the best companion plant for spinach?

Lettuce, arugula, radishes, peas, and many brassicas make excellent companion plants for spinach. These crops have similar growing requirements and help maximize garden space during the cool season.

Is spinach easier to digest than lettuce?

This varies by individual. Lettuce generally contains more water and less fiber, while spinach contains higher concentrations of nutrients and minerals. Some people find lettuce easier to digest, while others tolerate spinach equally well.

Which one is healthier, spinach or lettuce?

Both are highly nutritious, but spinach typically contains higher concentrations of vitamins, minerals, and antioxidants per serving. Lettuce provides excellent hydration and important nutrients as well. Including both in your diet offers the broadest nutritional benefits.