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So, I was out of town for a few days, and when I came back I discovered that my Flowering Quince had been invaded by aphids, dried up quite a bit, and lost a bunch of leaves.
I treated it yesterday with the Insecticidal Soap Spray (which seems to have gotten rid of the aphids, but also caused more leaves to fall off :S
I'm wondering now: Is one treatment enough, or would I need to repeat? Also, what are the chances of the tree recovering/growing new leaves this time of year?
TIA

Normally your tree should not suffer from this. Unless no-one was there to water the plant?

Impossible to tell what damage was done. But quince is hardy and take a lot of abuse.