Ask a Question forum: Hydrangea plant.

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Shoals Indiana 47581
twdowns
Dec 8, 2018 8:37 AM CST
I received a hydrangea as a (apparently) a houseplant. Anyway it was in a small container with a decorative outer container to place the whole plant in. How do I care for this through the winter in Indiana? It is already freezing and doubt one would set it out.
Name: Cindy
Hobart, IN zone 5
aka CindyMzone5
Celebrating Gardening: 2015 Plant Identifier
Shadegardener
Dec 8, 2018 9:50 AM CST
tw - I had received a "florist" hydrangea years ago and was able to do a little research on the plant name. Discovered that it wasn't really hardy below zone 6 or 7. I put it in a larger pot and it spends the warmer months - maybe spring through fall - outside in a shady spot. I bring it in over winter or put it in a cold frame where I maintain a temp above freezing. Does need fresh soil every couple of years. Hope that helps.
Only when the last tree has died and the last river has been poisoned and the last fish has been caught will we realize that we can't eat money. Cree proverb
Shoals Indiana 47581
twdowns
Dec 8, 2018 5:03 PM CST
Thank you, I had no idea.
Hurst, TX (Zone 8a)
Dog Lover Region: Texas
luis_pr
Dec 9, 2018 5:06 PM CST
In Zones 6 or colder, you need to have either (a) hydrangea paniculatas, (b) hydrangea arborescens (smooth hydrangea), (c) hydrangea quercifolia (oakleaf hydrangea) or (d) a rebloomer version of a mophead or lacecap hydrangea. If you have a non-rebloomer version of a mophead/lacecap, you will need to grow it in a pot and keep it inside during winter as shadegardener suggested. If you were to plant a nonrebloomer mophead/lacecap outside say in Zone 5, the flower buds and stems will very often get zapped by winter... And every year, you end with green leaves and no blooms. I would recommend very low growing rebloomers like those from the Lets Dance Series.

Mopheads develop invisible flower buds at the ends of the stems in July-August and these open in the Spring. Keeping the shrubs inside during winter protects the invisible flower buds and the stems from getting zapped by cold temperatures.
[Last edited by luis_pr - Dec 10, 2018 2:50 PM (+)]
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