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| tropical hibiscus (annual in NYC but can be taken inside during the winter months) |
1. Wait until the first frost to cut plants back. Gardeners have two choices: leave some old growth or cut stems all the way to the ground. If leaving some of the existing stem, cut it back to a height of about 12 inches above ground level.
2. Add a thick layer of mulch to the area. Adding at least a 12-inch layer provides insulation for the perennial hibiscus during cooler winter weather, keeping them cool without danger of becoming too warm or freezing.
3. Remove the mulch in spring after any danger of frost has passed. Fertilize with an organic fertilizer or a 10-20-10 formula.
Winterizing Container-Grown Plants
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| rose mallow (perennial hibiscus) |
2. Get the plant ready to be overwintered outdoors by wrapping it with a heavy cloth or tarp. The covering should stand up to frost, offering the plant protection on any nights when temperatures dip below freezing. Place a strand or two of outdoor Christmas lights on the plant under the tarp, turning the lights on during the coldest weather to give plants extra warmth during winter's chill. Avoid using LED Christmas lights as they do not emit much heat.
3. Move potted hibiscus plants next to the exterior of the house during a warm winter with only a few light freezes. This offers extra warmth and protection from light freezes. Ideally, select a west or south wall that gets a fair amount of sun during the day.
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| rose of sharon (perennial hibiscus) |
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