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Old April 22, 2018   #23
Zeedman
Tomatovillian™
 
Join Date: Dec 2011
Location: Wisconsin
Posts: 313
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Bean seedlings need strong light immediately after germination, or they quickly become leggy... so how early you plant them, depends upon the availability of a warm, sunny place to move them to. I germinate them indoors about 2 weeks before the recommended direct-seeding date, then move them into a solar greenhouse. Temps are USUALLY warm enough in the greenhouse by then. On warm days, I put the trays of seedlings out into full sun - but bring them back into the greenhouse at night (I've got deer).

If you intend to start beans earlier than 2 weeks ahead, then give them a large enough container to keep them from becoming root bound.
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