Bottlebrush Leaves Turned Red

Question

I live in central Florida and my bottlebrush leaves turned red overnight and they are now falling off

Answer 1

It could be an environmental issue like an unexpected cold snap or lack of water. It also could be a phosphorous deficiency or the pH balance is off. The best thing to do is have your soil tested. You can take a soil sample to your local cooperative extension service. Here is more:

https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/testing-soil.htm

Answer 2

Physiological leaf burn that turns foliage red is usually due to wintry/cold conditions at night. I used to bring my pot indoors when overnight temperatures below 60F were expected or by my city’s average date of first frost. You can bring them inside from the 3rd week in December through March 1st (consult 10-15 days weather forecast to ensure no unusual low temps). They can survive down to around 10F if planted outside but all growth above the ground will get zapped (it regrows in spring).
Mulch and keep an eye on the root mass to make sure it is remaining moist.

https://www.gardeningknowhow.com/ornamental/shrubs/bottlebrush/growing-bottlebrush-plants.htm