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Old 12-14-2017, 11:06 AM
 
Location: Pure Michigan
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I have first year roses, hydrangeas, and mums that I have in pots. When I put them in the garage for overwintering in the middle of November, all the leaves were green and healthy. In the past few weeks, the leaves are starting to turn yellow (on the roses and mums) and dropped. I'm nervous because this is my first time overwintering in the garage and I purchased the hydrangeas and roses this spring. It is 11F outside. How often should I water them? How do I keep them alive until spring in the garage?
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Old 12-14-2017, 11:42 AM
 
Location: Nantahala National Forest, NC
7,685 posts, read 687,846 times
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If your garage is not heated, IMO, bring them somewhere inside. If you still want to try..use space heaters ...water sparingly...you don't want to encourage growth during winter.

Some yellowed leaves are common this time of year.

FYI I do overwinter in garage but it is heated.
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Old 12-14-2017, 11:50 AM
 
Location: Pure Michigan
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My garage is not heated. But how low should the temperature go for them to reach dormancy?
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Old 12-15-2017, 08:27 AM
 
Location: East of Seattle since 1992, originally from SF Bay Area
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For hydrangeas and roses the leaves are supposed to die and fall off during winter dormancy. Ours stay out all year in the ground and manage fine but we rarely get below about 10-12F. Many varieties can endure colder than that in the ground if protected by mulch around the bottom 12" or so. Temperatures of about 40 or below should be low enough to go dormant. Since they don't take up water when dormant, just keep slightly moist, watering maybe once a week. The hydrangea is damaged by a really early frost, killing the next season's flower buds, or by an early hard frost after the leaves have started to pop out.
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Old 12-15-2017, 05:08 PM
 
Location: Forests of Maine
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I over-winter plants in my living room.

Plants need light, even in winter they need to get some light.

I have fig trees, lemon trees, tea bushes and Ginkgo trees that all come indoors for winter.
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Old 12-15-2017, 08:50 PM
 
Location: Pure Michigan
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Quote:
Originally Posted by Hemlock140 View Post
For hydrangeas and roses the leaves are supposed to die and fall off during winter dormancy. Ours stay out all year in the ground and manage fine but we rarely get below about 10-12F. Many varieties can endure colder than that in the ground if protected by mulch around the bottom 12" or so. Temperatures of about 40 or below should be low enough to go dormant. Since they don't take up water when dormant, just keep slightly moist, watering maybe once a week. The hydrangea is damaged by a really early frost, killing the next season's flower buds, or by an early hard frost after the leaves have started to pop out.

They are white Meidiland groundcover roses. I have 2 window boxes and one huge pot. They are so beautiful. They bloom like crazy in spring, summer, and fall. They are easy maintenance as well. I don't want to lose them.

The hydrangeas are Regula-White Bouquet hydrangeas. I have them in 2 self-wicker tall planters.
The hydrangeas are holding onto the buds but the leaves are brown and falling.
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Old 12-16-2017, 04:17 AM
 
Location: Anchorage
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This is my first year overwintering in the garage, too (Alaska). I put out a small space heater there and as long as the temps there stays not too much below freezing, I figured, they should be OK. (so far we've had the lowest of -5'F outside).
I do have a lamp on, though, and probably because of that my two rose bushes started growing back the leaves Currants and gooseberries are still dormant.
Quote:
Originally Posted by Submariner View Post
I over-winter plants in my living room. Plants need light, even in winter they need to get some light.
I have fig trees, lemon trees, tea bushes and Ginkgo trees that all come indoors for winter.
Most of those mentioned are not deciduous, I believe, so they definitely need light!
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Old 12-16-2017, 07:07 AM
 
Location: Chapel Hill, N.C.
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Here in NC it can be 26 in the morning and 62 by afternoon. I keep lots of plants in the garage but it has big windows on one side and large glass panels in the doors. When it is sunny and not really cold we just open the garage to give them maximum light and warmth for as long as we can. I've been able to overwinter many plants, including annuals like pansies, petunias, etc. and lots of begonias.

Why bring A Ginkgo indoors? They are hardy in all kinds of weather.
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Old 12-16-2017, 11:59 PM
 
Location: New Mexico
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Our winter (December is our coldest month) is fairly mild during the day (45-55 degrees) but desert nights drop into the low to mid 20s. My Key Lime lives as a refugee in the garage in winter but doesn't like it. I open the garage door on warm and sunny days. By spring the tree is struggling but bounces back once it goes outside. I don't worry about mums or most other plants. My experience is that they don't survive indoors. My bigger problem is watering indoor refugees -- too much or too little.
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Old 12-17-2017, 10:46 AM
 
10,139 posts, read 21,232,804 times
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You want them to be dormant. I overwinter in an unheated but attached garage. Water one or two times. Lack of sunlight will kill all leaves which is what should happen.

I put a dozen banana trees in and they are brown sticks when they come out in Spring.
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