They are just very late in flush out with new growth. They love hot, hot weather, and that includes night time temps. When the heat is steady, they will suddenly wake up and grow like crazy. Tell your DIL not to give up on them. I can take a picture of mine right now so you can see. Kati, I don't feed mine either. They do like neglect, I swear! They can grow beautifully in the worst soil you could have. When we bought our rent house in town, there were several Lantana bushes growing in the front yard. That soil was compacted, hard as a rock and dry as a bone, yet those bushes came to life and grew without any help from us the following year and bloomed beautifully. Mine do best if I don't pamper them or water them, but I feel guilty. The two farthest out in the garden seldom get watered and they grow great and bloom beautifully. I do weed around them, but that is all.

I'm having this problem right now with several plants - none of them susceptible to botrytis as far as I know. What is causing it on my plants is a combination of the heat, the drought, and the watering restrictions. The constant drying out between watering is causing the buds to turn dark and dried out like the ones in your pictures. Could that be the problem?

Hello Nicole thanks for your response I live in New Jersey And this winter doesn’t want to leave we are in April and the weather is still in the 40 the only day that it was nice was last Friday I have them in my dining room table we’re the sun hits a few hours a day but I am confused because I don’t know if I put to much fertilizer on it or it needs more I only add water when the moisture meter is between moist and dry so it around every two days I hope I did not hurt the roots when I check the moisture on the soil with the two sticks that are in the middle of the meter almost all the leaves including the new ones cumin out the tips are brown I don’t know what to do can you tell me if you can how to measure how much fertilizer to add on a 6” pot once the weather gets nice I will plant on the ground I got two musa rajoo and one tiny tiny and buy the water your banana tree are looking great can you tell me what fertilizer number are you using I am used 5-5-5 thanks again for all your help

They're short of water. The bigger question is why. Some of the possible reasons: Too wet; Too dry; Excessive heat; Excessively low humidity; and/or Damaged root system from tilling or ? Temporary shade might help.