How to start your own lettuce seeds in the AeroGarden

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If you don’t have a seed pod kit, the process for seeding your own AeroGarden pods is very simple. You can reuse an old pod basket/cage, and replace the sponge. If you have to buy sponges, it’s cheaper to use the BioDome type that Park Seed sells, specifically the 60 cell refill size. If you buy the AeroGrow brand, it costs about the same as the Park Seed, but you get less than half as much.

Replace the sponge, and place a small pinch of seeds in the hole at the top. You can use the nutrients that AeroGrow sells, but I make my own with a combination of 4-18-38 MasterBlend, Magnesium Sulfate (Epsom Salt), and Calcium Nitrate. I describe these nutrients in more detail here.

The strengths (and order of mixing) that I’m using for lettuce growing are:
1.6 grams/gallon 4-18-38 MasterBlend
.8 grams/gallon Magnesium Sulfate
1.6 grams/gallon Calcium Nitrate

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