Can I start new rose seeds inside the house and plant outside later?
by
Laurel F
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https://www.gardeningknowhow.com/ornamental/flowers/roses/growing-roses-from-seed.htm
You might try it under LED lights and leave them on all but 7 hrs a day. soak the seeds in water first over night to help germinate them. It is always worth a try! That is how I got started with seeds!