Hello,
For the last three years I have grown orange thunbergia (sometimes called black-eyed Susan VINE) in a hanging pot. The first year, it bloomed like crazy. The last two years, it barely blooms at all. The leaves look healthy, and it climbs well, but very few flowers. It gets sun, water, fertilizer, etc. I even bought them from the same place. The ONLY differences are the year (2004 vs 2006) and the soil. The year they bloomed, it was Miracle-Gro. This year, it's Dollar Store Brand. Okay, so next year I need to buy Miracle-Gro or something comparable. But this year I have used a lot of fertilizer, including all three "main" nutrients (N, P, K) and several micronutrients.
How can I get *this* year's plant to bloom? I don't think I can re-soil it without destroying the roots.
Thank you!
Ted Shoemaker, certified Gray Thumb
Madison, Wisconsin, US
USDA zone 4/5 AHS heat zone 4/5 Sunset zone 43