Answer: I think it is too late to plant tulips in pots that will be kept outdoors in temperatures that fall below freezing. You run the risk of freezing the bulbs in containers exposed to the weather you describe. If you want to do this next year, I would suggest planting the bulbs in smaller pots and water thoroughly. Then bury the pots up to the rim in a bid outdoors and cover with 4-6 inches of soil plus a 4-6 inch blanket of an insulating mulch. Uncover them early in the spring when the ground has thawed and place in the larger pot for growth and subsequent bloom.
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