The Q&A Archives: Germination Of Nierembergia

Question: I started Nierembergia from seed last spring. I sowed it indoors in seed starting formula, under lights,at approximately 65-70 degrees. I had only 15 seeds germinate of the 100. Though they were small plants, they did wonderfully once they became established and I would like to use these again. Can you help me get more of the seeds to germinate?

Answer: You might try keeping the seed flats a little warmer--closer to 75 F-- and see if that helps in germination. (Once the plants are up and growing, 65-70 is fine.) Were the seeds fresh? If they were left over from a previous year, that might have affected germination rates. One way to test germination is to take 10 seeds and place them between moist paper towels, then in a loosely tied plastic bag. Keep the towels moist, and check them regularly. If only one or two germinate, then there may be something wrong with the seed. If most of them germinate, then your seed-starting set-up might need adjusting. If the seeds were fresh (packed for the current year), and you feel they were defective, consider contacting the company where you purchased the seed for replacement seed.

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