I agree. I'm a commercial grower and regularly plant many dozens of bean flats in late winter/early spring, using deep-cell flats designed for tree seedlings to give the roots plenty of room to grow. We transplant the plugs after 3-4 weeks in high tunnels, being careful to squeeze the starts up and out of the cells very gently. When the plants take off they often don't resemble the nice, tidy little bushes pictured in the catalogues, but their tangled mess yields good quantities, often by mid-May, giving us beans to sell at the markets weeks ahead of other growers. We also direct-seed beans in the traditional way giving us continued crops for July, August and even into late October if we don't have a cloudy autumn.
I agree. I'm a commercial grower and regularly plant many dozens of bean flats in late winter/early spring, using deep-cell flats designed for tree seedlings to give the roots plenty of room to grow. We transplant the plugs after 3-4 weeks in high tunnels, being careful to squeeze the starts up and out of the cells very gently. When the plants take off they often don't resemble the nice, tidy little bushes pictured in the catalogues, but their tangled mess yields good quantities, often by mid-May, giving us beans to sell at the markets weeks ahead of other growers. We also direct-seed beans in the traditional way giving us continued crops for July, August and even into late October if we don't have a cloudy autumn.