Wintering an Alstromeria - Knowledgebase Question

Chester Springs, PA
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Question by shipmom123
November 8, 1997
I have an alstromeria that I planted in a container as I was unsure it would winter over in the ground. It flourished in the summer on my deck and now is still thriving with good foliage, but not any flowers. I still have it outdoors and assume I need to wait for the frost to hit it several times and then cut it back and bring it indoors. Is this right? What do I do once I bring it indoors?

Answer from NGA
November 8, 1997
Alstroemerias are summer-flowering herbaceous perennials that are generally not hardy north of Washington DC. One variety, A. aurantiaca, will survive (with protection) as far north as southern New England.

Alstroemerias prefer regions with relatively mild winters and not-too-hot summers.

If frost hasn't killed the foliage, bring the plant indoors. Try to keep it in a bright but relatively cool spot (50-60F) and water sparingly, but don't let the soil dry out completely. The foliage should naturally die back and the plant will enter a dormant phase. Once the plant is dormant, cut back on water even more and keep the container in a cool, shaded place. When you see sprouts, move the plant to a bright location and increase water.

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