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Hibiscus Plants

Q.The Rosa-sinensis A Bush Or Tree Can It Stay Out Side In W Inter

Zone 48097 | Anonymous added on July 3, 2021 | Answered

The tag does not give me info on hardyness, bought it at Walmarts island bloomd grown by costa farms florida

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luis_pr
Answered on July 14, 2021

Hibiscus rosa-sinensis, also known as tropical hibiscus, does not tolerate frosty or freezing temperatures. In Michigan, grow it in pots but bring it inside once overnight temperatures go below 50°F. Keep it near a south facing window during winter so it gets some daylight sun but away from cold-hot air vents. Expect the plant to temporarily pout when initially brought indoors for winter. Bring it outside when overnight temperatures are above 50°F. Costa Farms is a wholesaler that sells hibiscus rosa-sinensis (tropical hibiscus) as well as (winter) hardy hibiscuses that can be planted in the ground in Michigan. Note: always check the plant label or the wholesaler's website to confirm winter hardiness, even that of hardy hibiscus as the range may vary. For example, many have an upper limit of USDA Zone 4 and others have an upper limit of Zone 5. Then remember that USDA Zones are averages and in extreme weather events, you may experience colder temperatures that your USDA Zone Number "implies". If the nightly temperatures get under 40°F, their metabolism will slow down and will need much less water & fertilizer than usual. Slowly resume fertilizing about 2-4 weeks after temperatures are above 50°F as it will take them a while to crank growth back up when it has been cold. They are sleepy creatures that may delay actively growing for a few weeks after overnight temps have already been above 50°F.

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