“But my mandevilla plant is not giving me any more flowers. Any suggestions?”
Most likely a nutrition issue. Look for a fertilizer with a high MIDDLE number. Phosphorous is needed for reliable blooming for flowering plants.
If you’re using a fertilizer right now with too much Nitrogen (first number, N-P-K) you’ll have a lush, lovely, leafy plant, but no blooms.
If the plant is potted, use a lower dose of fertilizer, but fertilize more frequently. Potted plants, especially in the summer months, need watering daily, and due to good drainage, nutrition is washed out before the plant can absorb it.
Miracle Grow makes a nice Bloom Booster, 10-32-10, which is water soluble. Other favorites of mine are Jack’s Classic Bloom Booster 10-30-20 and the whole line of AlgoPlus (used to be called AlgoFlash) products are really good!
(This has been a non-paid endorsement, LOL!)
Well, thank you very much! I think I may have bloom buster here! I’ll go look; but I know I can pick that up easily.
On the other hand, my banana plant/tree is progressing nicely. I planted it close to the side of my house and every day I watch a new leaf unfolding. It’s the most exciting thing I have in my garden being a northeasterner transplanted down south who never expected to own a banana tree. My neighbor suddenly got a bunch of bananas hanging from her tree after 4 years.