Spring 2022 Sale! Buy any 2 items and get 10% off total purchase for a limited time. This is for 1 gallon, 2 gallons or 3.5 gallons of seed germinating soil mix. Free shipping. This soil is specially mixed for use in seed germination. Great for starting plants from seed, indoors or outdoors. This is a mixture of perlite, vermiculite, and sphagnum peat moss. Shipped in USPS flat rate priority envelopes or boxes.