You may have heard it’s best to wait until the weather is cool to bring house plants back inside but take care of this before nighttime temps fall into the 50-degrees F range, instead.
As long as they haven’t been frosted or frozen, house plants won’t die from a late move. But leaving them out for too long before bringing them back into a warm house can cause them to go into shock and drop their leaves. You want to make the move when indoor and outdoor temps are similar. If you’re still concerned about bugs, just treat the leaves, soil and pots with an insecticidal soap before returning plants to their winter home.