Thu, Jan 24, 2008 · Filed under Flowers, Indoors, Seed starting, Tools, Winter
Grow rack lights went on today for the first time this season. They’re only for the rescued houseplants (orchids, wintergreen, heather)—I guess every plant deserves a place in the sun—but, I’ll be starting super-early lettuce soon, a month earlier than ever, for an experiment in planting them out to the greenhouse at the beginning of March. Getting the grow racks ready is another familiar routine. In early summer, I remove the fluorescent light fixtures and the chains and dowels they hang from and store ‘em somewhere (last year, it was on the new Big Shelf). For spring, I dust them off, wipe them down, hang them, and a new seedling season begins!
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Sat, Mar 17, 2007 · Filed under Farm lab (research!), Indoors, Seed starting, Tools, Veggies, Winter
Plant racks, light stands…I usually call ‘em grow racks. They’re filling up now.
Pushed to capacity, the three racks can hold a total of 36 trays, 12 each, or four trays per shelf. So, depending on the size of the plug sheet—I use 38s, 72s, 128s, 200s—I can start between 1,368 and 7,200 seedlings.
Sounds super-efficient. HOWEVER, it comes down to the light. With four trays per double fluorescent fixture, the light is pretty stretched, and a lot of rotating is in order.
Also, most of the fixtures are the old standard T-12 type, where the light is stronger towards the middle of the tube. You can clearly see the difference in growth if you leave trays in the same position for a few days. The newer T-8 type lights more evenly from end to end and uses less power, but I don’t feel like replacing all the fixtures (a couple in there are already T-8).
It’s an ongoing experiment to see which size plug sheet to best start in for each crop, given the light situation. That in turn determines if or how often I need to pot up to larger quarters before it’s time to transplant into the field.
All in all, I’ll get around 2,500 seedlings off the racks this year.
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