By Ang5_3
United Kingdom 
I have a mimosa dealbata in the garden, currently it is about the height of the house 30 feet approx. I love it and fortunately so do my neighbours. However in the last two years the spread of the tree is about 4 metres and causing a lot of shade and mingling with the apple tree.
I am looking to give this a hard cut back on the sides and maybe a bit off the top.!!
Has anyone done this to their mimosa.
29 Apr, 2015
Answers
Botanic, thank you for your response. It's echo's other advice I have been given.
30 Apr, 2015
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You can hard prune Acacia but you are better to shape the tree and or remove side branches. Do it in May as any frosts seem to really affect regrowth I have found.
29 Apr, 2015