Growing Petunias From Seed - Knowledgebase Question

Seminole, FL
Question by demimd1
December 16, 1997
I started some petunias from seed indoors in a sunny window approximately two months ago. Many of the seed have sprouted, thanks to your instructions on how to sow the seeds. However, they have grown to a height of about one inch and have stayed there. I have even occasionally watered them with a Miracle-Gro mixture. What must I do to get them to continue to grow?


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Answer from NGA
December 16, 1997

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Petunias are very slow-growers. They can take 12 weeks or more to grow large enough to plant outdoors. However, since yours are eight weeks old and just an inch tall, they are probably stunted by something. Are they getting enough light and warmth? Generally it's a good idea to give growing seedlings about 16 hours of light per day; your window location may not be providing enough light. And they like a temperature of about 65-70F.

If your petunias are growing in trays or flats, they may be very overcrowded. If so, they should be transplanted to small idividual containers. After transplanting, keep soil moist but not too wet. Fertilize them with a dilute fertilizer every week once they are actively growing. When they are large enough, transplant to the garden.

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