Lettuce - Cos Seeds

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Lettuce - Cos Seeds

$3.00 AUD

This super fresh crispy lettuce is perfect for indoor growth and can be used in an endless number of salads and sandwiches! Grow them hydroponically in your indoor grow kits to save time, water, and stress!

Cos lettuce is super easy to grow hydroponically so chuck it in one of your units and watch it grow! These can often take a little while to germinate so be patient! No need to use all the seeds at once though as there are way too many for one round of growing. It may be a good idea to start growing a small amount in one grow pot, before waiting a few weeks to plant seeds in the other. This way you allow for some crop rotation so that you always have a crop available!

Harvesting: Once your plants are about 10cm tall you can begin to harvest them! Pick the outer leaves continually or if you’re hungry you can pick the whole plant and plant some replacement seeds.

Cos lettuce is perfect for eating fresh in salads or if you’re feeling adventurous; try adding it to a stir fry for a lovely rich lettuce flavour!

Ready to plant? Start your seeds in our Grodan rockwool cubes, feed them with our hydroponic nutrients for herbs and leafy greens, or grab a re-plant pack with both at a better price.

New to growing indoors? Read what you can grow in a hydroponic garden and how to make hydroponic plants grow fast.

Scientific name Lactuca sativa
Quantity of seeds ~150
Planting depth 6 mm
Plant height 30 cm
Days to maturity 80
Lifespan Annual
Tips Scatter seeds in the growing pot. Don't use all the seeds as there are way too many for one round of growing. It may be a good idea to start growing a small amount in one grow pot, before waiting a few weeks to plant seeds in the other. This way you allow for some crop rotation so that you always have a crop available.

good to know

questions about the Lettuce - Cos Seeds

Quick answers before you buy. Still unsure? Our Sydney team is happy to help.

1 year warrantyIf anything goes wrong in the first year, we'll arrange a repair, replacement or refund.
see all FAQs

How much of my plant can I harvest without killing it?

Wait until the plant has three sets of true leaves (the ones that look like the mature plant, not the first seed leaves). Then use sharp scissors to cut the top of the main stem at a 45 degree angle.

Basil can be harvested again and again, and often grows faster with regular light trims. Lettuce is best harvested all at once, or pick the outer leaves and let the centre keep growing.

How long do seeds take to germinate?

Most seeds show signs of life within 3 to 7 days, depending on the plant and how warm your home is. Typical germination times for our seeds:

  • Genovese basil: 5 to 10 days
  • Coriander: 7 to 10 days
  • Cos lettuce: 7 to 14 days
  • Dill: 7 to 21 days
  • Rocket: 7 to 21 days

Warranty & returns

We offer change of mind returns on all products, and a 1 year warranty on all electrical goods. We're also so confident in your success, that we have a 60 day seed guarantee, and will replace any seeds that don't grow free of charge!

Buying with Gathera gives you access to our community and all our range of special resources to help you grow:

  • Access to our community page.
  • Horticulture experts on hand to help you out.
  • You're buying into an ecosystem – need to replace a pump, light, netcup or other component? We have replacements available so that you don't have to ditch your whole system when one small thing breaks..
  • We sell the stuff you need to feed your gardens - nutrients, seeds, growth mediums.
  • Comprehensive FAQs.