Mom and I planted our first seeds during the last week of February. Daddy and Jacob kindly constructed some flats that fit our grow-shelf for us to use, as our soil-block makers are on back-order.
We decided to mix our own soil instead of buying pre-packaged soil, which has chemical fertilizers in it. We couldn't find all the ingredients we wanted, so we had to make do with what was available. In a big Rubbermaid container, we mixed together some sphagnum moss, vermiculite (sharp sand), dolomitic lime, and dirt from our garden spot. ( We learned that it would be best not to mix soil on a windy day, as dirt blows everywhere and gets in your eyes and all over your clothes.)
We lined the flats with newspaper and filled them with our newly-mixed soil. We then planted some cabbage and pepper seeds, watered them, and recorded what we planted in our garden notebook.
Note that this picture is staged. We ended up taking the markers out, putting a black trash bag over the flat, and making the light much lower (almost touching the flat).