19 plants House seed starting ideas

This 3 ingredient seed starting mix recipe uses 8 parts coco coir (or peat moss), 1 part vermiculite, and 1 part perlite (or pumice). It’s easy to make, inexpensive, and the best soil for seed germination. Here are step-by-step instructions for how to make seed starting mix yourself from scratch! This 3 ingredient seed starting mix recipe uses 8 parts coco coir (or peat moss), 1 part vermiculite, and 1 part perlite (or pumice). It’s easy to make, inexpensive, and the best soil for seed germination. Here are step-by-step instructions for how to make seed starting mix yourself from scratch!