When it finishes flowering, cut it back by about a third.

"The Pennsylvania bittercress has finished flowering, and it's usually much later," he said this day.

But the month was September, and the jasmine creeper outside that window would have finished flowering.

If the entire plant looks bad, he says, don't be afraid to cut the foliage back to the ground after it finishes flowering.

Can I keep them indoors through the winter or will they die when they finish flowering?

Give them a light dose of general houseplant fertilizer once a month, starting when they finish flowering.

"Plant them in the fall and take them out when they finish flowering."

When they finish flowering, I put them away to rest in a dark place.

This gives the borders a different appearance when viewed from each end, and helps disguise plants that have finished flowering.

I know it should be done after they finish flowering.