My bottle brush plant only bloomed the first year planted & it has been 2 years since it last bloomed. It has leaves on the top but the other half is brown with no leaves. It sits in the middle of the yard so I know it gets plenty of sun.
Bottle Brush Plant
Certified GKH Gardening Expert
It is likely that there is too much nitrogen in the soil. You can offset this by adding potassium and phosphorus, or adding dolomitic lime to the soil to make the nitrogen less available. Here is an article for more information: https://www.gardeningknowhow.com/ornamental/shrubs/bottlebrush/bottlebrush-wont-bloom.htm