Butterfly Bush Isn't Happy
Last year we planted a butterfly bush in a large wooden container on our deck. It did very well all summer & bloomed.
In the fall I cut the bush down & we put the container in our basement where it stayed very cool all winter. The bush got sun from the garage door window.
I watered it all winter. It has been slowly growing all winter & has branches on it.
Now the longer branches are falling over & the whole bush looks unhealthy. The leaf tips are turning black.
I am in Zone 6 & we can have frost up until May 31.
Does anyone know what I can do? Should I cut the branches off again? When is it safe to put the container outside? Why are the branches bending over & the leaf tips turning black?