This winter is ending rolling right into warm spring days. Normally I leave my winter covers on until late March or early April.
If the weather stays with highs in the forty's the winter covers can be removed.
I don't like to leave the boxes on too long because the sun is getting stronger and will start to beat up the boxes. The sun can melt the wax coating. The coating keeps the cardboard waterproof.
The forecast for the next 15 days shows highs in the 50's almost everyday.