It is officially spring now. The days are growing longer and the sun is definitely stronger and higher in the sky. A boy’s thoughts are supposed to turn to starting seeds, forgetting the winter that would not end. I have already started my onions and the seedlings are doing great. While I still felt like hibernating, this week I did get my tomato and pepper seeds planted.
I am starting the tomatoes separate from the peppers because the peppers take so long to germinate. I used 3/4” soil blocks for the tomatoes and will plant up to 2” soil blocks when they get some true leaves.. This year I am using a bag of McEnroe’s Organic Potting Soil I saved from last year to make the blocks. Compared to Johnny’s 512, it is much finer and has fewer twigs and rocks to pick out. I added some horticultural grade vermiculite, since it is lacking that. I covered the seeds in the dibbles with some UltraSorb, described later, and put the tray on the heat mat.
For the peppers and eggplant seeds, I decided to pre-germinate them in a medium and transplant them to 1 1/2” soil blocks when they get some true leaves. The medium I am using is UltraSorb, a product from Moltan and sold by Autozone stores in the US as an oil absorbent for garage floors. UltraSorb is granular diatomaceous earth, not at all like food grade DE or the powdered DEs used in swimming pool filters. It is very popular and extensively discussed on the Tomatoville forum, where it gets rave reviews.
To hold the UltraSorb, I used a Styrofoam egg carton with slits cut in the bottom for drainage. The idea is to provide enough opening to drain (and bottom water) the tray without allowing the UltraSorb to leak out. I used a razor knife to cut the slits, but found I needed a few direct holes in the bottom (made with a toothpick).
I used a Sharpie to mark each cell with the pepper variety. Each cell was filled with UltraSorb and moistened with water. I then used a pencil as a dibble to make planting holes, planted the seeds, and covered with a little extra UltraSorb. If you want to try using UltraSorb, make sure you get the product by that name manufactured by Moltan. AutoZone sells another absorbent that is made from calcined clay and it’s pH isn’t suitable for seed starting.
With that done, next step is to get some of the brassicas going, broccoli, kale and collards, and then the lettuces. This year I am also going to start the kohlrabi seedlings indoor rather than direct sow. I keep forgetting they are not a root vegetable. Indoors at least, spring is happening. Outdoors, a lot of snow has melted but we are still getting single digit nighttime temperatures. Everyone around here is tired of winter and can’t wait for warmer weather.