What an odd thought, what image comes to mind: the world of kerosene… And now I’m in it! Purchased new today, at a healthy 35% discount, this small, rather inexpensive, KeroWorld-brand indoor kerosene heater is the core technology in the extended-spring greenhouse plan. The idea is to turn the unheated hoophouse into a barely heated one, by warming it at night so that it stays above 38°F (4°C). That way, I can put out seedlings weeks early, instead of crowding them under scarce indoor lighting until it warms up in April. It should also give the earlier-than-ever lettuce, going into the ground in the greenhouse, a smoother start. This heater is low-powered—10,000 BTU, recommended for 420 sq ft, it’s 640 sq ft out there—but only a wee bit of heat is required. I think. Last year’s propane space heater was quite efficient, but burned too much gas for every-night use, it often went out by itself, and it required lots of ventilation. Plus, I don’t really like relying on pressurized tanks. This heater will hopefully burn low and steady, and it’s pour-to-fill! Aided by a fan to keep the air moving, and row cover on the coldest nights, it should get the job done. This all reminds me of Patrick of Bifurcated Carrots’ comment a while ago about the line between good and bad technology. It seems a personal decision as much as anything. Why don’t I dream about full-blown winter greenhouses, with high-intensity lighting and industrial-strength heating and ventilation, I wonder? Dunno. I just don’t. But an extra growing month in the strengthening sun, and a little less reliance on indoor lights, traded off against some kerosene, well, THAT would be cool!
heating
Seedlings aplenty
It’s getting crowded on the grow racks and under the four-light fixture tucked away behind (busier than one month ago). Going now, there’s tomato, pepper, eggplant, broccoli, cauliflower, Brussels sprouts, bok choi, chives, parsley, plus more to be started in the next couple of days. Right now, around 2,500 seedlings in all. The plug trays on the top shelves are 200-cell. In a couple of weeks they’ll have to be potted up to larger quarters, and depending on what size I go to, will take up 5x to 10x more space. There are also a few 128s, and even in 72s, the earliest plantings need to be moved up. Already, the light is stretched. The shoplight fixtures are really only good for two trays apiece. I’d gambled on a much warmer April so I could use the unheated greenhouse. Now, I’ll have to spot heat with the propane construction heater, which is a bit of a pain since it has no thermostat—night work. To keep everything reasonably stocky, not stretched or stunted, there’s a lot of juggling coming up! It’s great!!