Ed, I love to grow Wave petunias from seed. I usually start mine March 1st,
give or take a few days. Seed is pelleted; I try to grow two together for a full
look. Seed of Waves is pelleted so easy to manage; other petunia seed is
very small-like tiny poppy seeds.
They need light to germinate, I do use a heating mat but have had good success without one at room temperature. Seed germinates in a week
(sometimes less), tiny, tiny plants at first but their saving grace is that they grow every day! Easily tranplanted and I make sure there are 2 in each 4"
pot. About the first or second week in May, I'll transplant into borders.
Many will be blooming at that time.
I think I actually have better success with non-pelleted seed so I don't see
pelleted petunia seed as much of an advantage except Wave seed is comparatively expensive and few seeds in a packet.
While growing, I'll generally use a weak soluable fertilizer of some sort-
usually the same that I use on the rest of my plants.
Darlene
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