How Long for Primulas to Bloom from Seed - Knowledgebase Question

Fairfax, VA
Avatar for droyston
Question by droyston
January 28, 1998
How long from seed sowing until primulas bloom?

Answer from NGA
January 28, 1998
There's no exact answer, since much depends on growing conditions. In general, if you start them in a greenhouse or a warm room under a growlight, plan to sow seed 8-10 weeks before the last spring frost (occurs around April 10). You'll need to transplant them at least once before they go into a flowerbed or planter. They should bloom within 10 weeks of transplant - so, to answer your question, they should bloom within 20 weeks of sowing.

Primula seed may need prechilling before sowing. Ifyour seed packet/catalog/source doesn't confirm that your seed is prechilled, mix seed with moist seedstarting mix, and store in a plastic bag in the fridge for 3 weeks. This simulates winter and breaks seed dormancy. Hope this info is helpful!

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