Still cranking on microgreens. We’ve been focusing on four different varieties:
black oil sunflower
…and playing with different quantities of seed, soak time, varying air flow, etc.
In the photo we have two batches of peas. Same start date/time, same soak duration (12 hours), same seeding density (60 g per 8″x8″ pie tin), same lighting, both bottom watered, both harvested at the same time (after 8 days of growth)… only difference was that the tray on the left had peat moss and vermiculite as the soil medium and tray on the right used organic potting soil. We got 118 grams of sellable product from the right tray and only 61 grams from the left tray. It seems the organic potting soil is the clear winner here.
We give the birds a few different types of food, one of which is birdseed. It appears to be a combo of black oil sunflower, striped sunflower, and maybe millet(?) So, in parallel with our microgreens efforts, we’re seeing if we can extend our birdseed supply by foddering it. This basically means germinating the seed and then letting it grow another handful of days beyond that. The shortness of the growth period is such that the sprouts don’t need any nutrients from soil and really don’t even need light. Basically just air, water, and reasonable temperatures (eg room temperature). So for little to no input costs (amount of necessary temp control would be seasonal) we can essentially double our supply of birdseed via this method.
The sample Elissa has in the photo was “harvested” this morning. It was originally 117 grams of birdseed, started germination on January 12…. and grew to 234 grams of fodder in the subsequent week. So, exactly 2x. Supposedly, the nutritive content is actually higher (I assume per unit weight), but I’d like to find some more info on that. The birds gobble it up pretty quickly.
First batch of microgreens ever, planted Sunday, December 2. Growing three trays on 3rd shelf up from the bottom. From left to right: arugula, sunflower, and buckwheat. Soaked the sunflower and buckwheat seeds for 10 hours or so before planting… arugula was planted dry. We’ll see how it goes!
Trays on shelf #2 are soil samples collected from various locations outside… to be sent to VA Tech for analysis. They’ll provide reports on each which will let us know what amendments we might need to make to our soil to prepare it for spring gardening.