Hi! I have mixed up a seed starting soil and have an abundance. Would you like some to start your seeds? I can't guarantee it is top notch quality as gardening is always an experiment but I mixed 1:1:1 vermiculite:perlite:coco coir and my son threw in a small bag of compost as well. We can do an exchange of time for amount of soil depending on how much you need.
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If you would like I can hook you up with some soil and seeds in a tray for you to grow.