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Rudbeckia Seeds - heat mat or not?

Posted by ginnyginny Zone 9 Calif (My Page) on
Fri, Feb 25, 11 at 15:02

I'm trying Rudbeckia seeds for the first time. I know they are supposed to be easy, but growing from seed is not particularly easy for me.

I did put them in the refrigerator for two weeks as I read could help with germination.

Now they recommend placing them in a 70 degree room. I don't keep my furnace at 70, in fact when I'm here it's at 67, when I'm gone I turn the furnace off. At night I turn it off and the temp gets to 58+.

Would you recommend putting them on a heat mat where they could stay warmer 24 hours a day?

I forget if I'm supposed to keep them covered with saran wrap until they germinate?


Follow-Up Postings:

RE: Rudbeckia Seeds - heat mat or not?

  • Posted by morz8 Z8 Wa coast (My Page) on
    Fri, Feb 25, 11 at 20:31

Ginny, you might get faster germination with a heat mat if you have one already - I wouldn't buy one specifically for the rudbekia seeds.

They will still germinate at cooler, it just may take a little longer. At 70F, barely covered or surface sown, they can take 5-21 days. Covering the pot or flat with plastic wrap can help keep the humidity/moisture in and save you some of the attention that would need, just remove it at first sign of germination.

RE: Rudbeckia Seeds - heat mat or not?

Thanks for the advice. I guess I'll just be patient and skip the heat mat for now. I think once they germinate I should put them under lights.


RE: Rudbeckia Seeds - heat mat or not?

My Rudbeckia seeds just came up in less than a week with no prechilling. The pot sits on a 70 degree mat covered with wrap which I just removed. They are in an unheated greenhouse with about 8 hours of added light, because my greenhouse is partially shaded. Without enough light they will be very spindly with a weak stem. When they get about an inch high I will take them off the mat. I would do it sooner if the weather would warm up a bit. Your fluctuating house temperatures will be no problem for them. Al

RE: Rudbeckia Seeds - heat mat or not?

Hi Al,

Thanks for your input. I'd better get my light table cleared off; it's in the garage. I hope this goes well as I haven't had much practice with seeds under lights.

The Rudbeckia I'm growing is the one with the green center. I only see them in gallon containers in the nursery. I hope to take one or two to my garden club's plant sale.



RE: Rudbeckia Seeds - heat mat or not?

Hi Ginny, you won't need the light until germination has taken place. It will not hurt to have the extra light now, but not having it, will not prevent normal germination. I started a lot of seeds too early,lured by a couple of weeks of unseasonably warm weather,I am finding which seedlings will tolerate the cold best or worse. I have learned to always plant only a sample of any seed, so my losses are minimal. Al

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