When to plant - Knowledgebase Question

NY, NY
Question by FRANBRAD
January 20, 1998
I have a north facing terrace in NYC. It's well protected from wind & gets morning sun starting in February. When will it be safe to plant seedlings of the following items in my window boxes and containers: Sweat Pea, Morning Glory, Impatiens, Thunbergia, Nasturtium, Coleus, and Snapdragons?


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Answer from NGA
January 20, 1998

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I would not try to set out most of your mentioned plants before the end of April. We can still get a frosty night, even in New York city, until then. The exception would be sweet peas and snapdragons. These can take a light frost and survive, so perhaps put these out a few weeks earlier. The sweet peas and nasturiums should be direct sown in the soil outdoors. The coleus and impatiens should be started about 10 weeks earlier indoors under lights. The thunbergia and snapdragons can be started about 6-8 weeks before the last frost date in the same way and then transplanted out into the garden.

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