I'm starting seeds in plain coco coir. The idea is the seeds of enough 'stuff' to support their needs for the first few weeks.I watched a YouTube video today on why seed starts get leggy. Of course, the #1 reason was not enough light. I knew that. But one of the other reasons he discussed was using compost as the seed starting medium. According to him, the phosphorus level of compost - especially manure-based composts - was too high in phosphorus and that would cause the plants to grow too fast and become leggy.
So, I am wondering if my chicken run compost would not be the right medium for seed starting because chicken compost is higher in phosphorus than cow manure, for example? Having said that, most of my chicken run compost is actually composted leaves and grass clippings, with a scattering of chicken poo in the mix. I know it sure works good in my raised garden beds, but is it too strong for potting up seeds in the house for transplanting later?
At any rate, my chicken run is still covered in two feet of snow, so I will not be sifting any compost for many weeks. I purchased a 2 cubic foot bag of Miracle-Gro Potting Mix today at the Fleet store on sale for $12.99. That was the best price in town.
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I plan on using the Miracle-Gro potting mix in 3-inch net pots to start my tomatoes and peppers in a few weeks. But I am wondering if I can mix peat moss and my chicken run compost later in the spring to make potting soil. It sure would be less expensive. Any advice appreciated. Thanks in advance.