To get artichoke heads in climates where they can not overwinter, they can be fooled into thinking it is the second year. They are started out indoors in mid winter, and kept quite warm. Then they are moved outdoors and given several weeks of cold weather before things warm up in the spring. They go ahead and produce artichoke hearts.
Could this be used to speed breeding and seed saving work on other biennials? One drawback I can see is that it might select for early bolting, or poorly formed heads on cabbage. But there might be ways to get around this, I'm not sure.
Post by Joseph Lofthouse on Dec 21, 2016 13:49:56 GMT -5
One year, in my valley, we had a deep cold (16 F) just after the carrot seedlings had germinated. We didn't have carrots for the early markets that year, because the carrots in all of the growers fields immediately went to seed instead of forming large roots.
Silt/clay, high-altitude, super-arid, sun-drenched, irrigated-desert garden. Cold radiant-cooled nights. ~100 frost free days. Grow most of my own locally adapted landrace seed. GDD10C ~1300. Author of Mother Earth News: Landrace Gardening Blog.
In my graduate research with winter barley, I would put barley seeds on moist filter paper in a petri dish, let it set a few days untiil it looked like they were about to sprout, then put them in a refridgarater for 30 days. After 30 ddays, I took them out and planted them in1-gallon pots. They grew and flowered quickly. Withhout this treatment, they took much longer, many never blooming at all without cold treatment.
This was called Jarowisation in the former eastern world if I remember right.
Something like that...and yes, Russia/Soviet Union had the most research on it, but some of the papers/research has been discounted/proven falsified as it was geared toward proving production quotas as opposed to serious research into accelerating blooming of split season plants (biennials and fall sown crops).
I had a bunch of links to some of the research, but I'm not sure they survived two hard drive crashes or if they did, they are on one of the old IDE hard drives that I haven't hooked up in ages.
About 39° N, 79° 58' W at just over 2000'; ostensibly Zone 5B. Weather is highly variable and seldom as forecast, with about 49" annual rainfall. According to the maps, the climate zone border runs right through my yard.
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