September: get ready for next spring 🌱


Cos Lettuce

Cos Lettuce

Our Cos Lettuce - aka Romanesque Lettuce - is tasty and crisp. Handles hot weather better than other lettuces. And even better for you!

€ 1,99

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Sowing time: March - Sept Height: 15-25 cm Weight: 0.5 grams

More info

Cos Lettuce

This lettuce is a cross between romaine and head lettuce. It’s a tasty and crisp variety that forms fairly compact heads. Ideal for the 30x30 cm square plots in your Planty Garden. Since this lettuce can handle heat well, it’s a good summer variety. 
Species name: Little Gem - Sucrine 
Family: Leaf 
Plants per square patch:
Height: 15 to 25 cm 
Sowing time: March - September 
Sowing depth: 0.5 to 1 cm 
Germination time: 5 to 18°C in 2 to 14 days 
Time to harvest: After 6-8 weeks 
Sunlight: Can grow in sun or shade 
Want to buy Cos Lettuce seeds? We sell seed bags separately, or, you can get them as part of a seed pack: 

What's so special about our Cos Lettuce?

This lettuce is a mix of romaine and head lettuce. It’s a tasty, crunchy variety that doesn’t mind summer weather. It does much better in the heat than other varieties. 
Cos Lettuce’s dense heads don’t take up much space. So you can fit 4 to a square patch. 

Sowing and growing

Growing this lettuce is simple: put a few seeds in each hole and keep the soil mix moist. After they come up, thin out the seedlings and leave just 1 plant per hole. Four plants fit in one square patch. 

If you’re having a cold spring, you can cover the plants at night with some fleece or the MM-Muts cover to help them grow faster. 

And watch out for snails: they love young lettuce. 

Step-by-step sowing and growing instructions are in the Planty Gardening app.  

How do you use it?

Lettuce leaves are great for salads. Or, they’re also tasty in green smoothies. 
Harvest the whole heads, or pick the outer leaves and let the rest grow. 
Once the plants start to bolt (flower), the leaves get tougher and a bit bitter. Use these older leaves in a stew, soup, or stir-fry: yum!