I bought sunflower seeds from B & Q to grow with my little granddaughter. I grew them on the window sill until they were established and planted them on in pots. I have a south-facing garden and the stems are now about 5-6 feet high, but although there is plenty of foliage, there are no buds. Can you give me any advice?
Sunflowers Not Blooming
You might find this site helpful to answer your questions
You may need to be patient, most varieties of sunflowers have a fairly long growth period before maturity. It depends on what variety you planted. I have 2 Maximillians in full bloom and other varieties haven't put out bloom yet.
Hope that helps,