Ask a Question forum: Mandevilla winter care

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Notsogreenthumb
Nov 1, 2016 10:57 AM CST
I brought my Mandavilla indoors several weeks ago when the weather started to turn cooler. It gets lots of indirect sunlight & had been doing well until about a week ago. I noticed some of the leaves were turning brown/falling off & the soil appears to be moldy in places (yellow). Is this from over watering or fungus? I wait until the soil is pretty dry before watering. Can I save it?
Name: Philip Becker
Fresno California (Zone 8a)
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Philipwonel
Nov 1, 2016 11:17 AM CST
Sounds like it needs more lite.mabey. Less water . mold on soil. Not dring out quick enough. Next time you water it. Mix 1/4 peroxide with water to kill mold. It will also give plant more oxygen. Make it happy.
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Name: Karen
NM (Zone 7b)
Region: New Mexico Region: Arizona Cactus and Succulents Greenhouse Sempervivums Bromeliad
Adeniums Garden Ideas: Level 1 Tropicals Xeriscape Garden Art Plumerias
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plantmanager
Nov 1, 2016 11:19 AM CST
I brought mine into the greenhouse a few weeks ago. It has dropped all of it's leaves after they turned brown. No idea what is up with it, but I hope I can revive it. It was one of my favorites. I will try your peroxide trick, Philip.
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Name: Daisy I
Reno, Nv (Zone 6b)
Not all who wander are lost
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DaisyI
Nov 1, 2016 1:59 PM CST
Welcome!

I think your Mandevillas are going dormant for the winter. Supposedly, you can keep them from going completely dormant but I never managed. I used to put mine in the greenhouse in the fall and it always went completely dormant.

Cut back on water - the fungus on the soil is a sure sign of overwatering.
Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and proclaiming...."WOW What a Ride!!" -Mark Frost

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Name: Karen
NM (Zone 7b)
Region: New Mexico Region: Arizona Cactus and Succulents Greenhouse Sempervivums Bromeliad
Adeniums Garden Ideas: Level 1 Tropicals Xeriscape Garden Art Plumerias
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plantmanager
Nov 1, 2016 2:25 PM CST
I didn't know they'd go dormant, Daisy. Mine was green and blooming all last winter in the greenhouse. This year, nothing but stems. I will cut back on the water.
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Name: Daisy I
Reno, Nv (Zone 6b)
Not all who wander are lost
Garden Sages Plant Identifier
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DaisyI
Nov 1, 2016 6:01 PM CST
You can check for life in the stems by scraping with your fingernail. Green = alive, brown or hard = dead.
Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and proclaiming...."WOW What a Ride!!" -Mark Frost

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Name: Anna Z.
Monroe, WI
Charter ATP Member Greenhouse Cat Lover Raises cows Region: Wisconsin
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AnnaZ
Nov 2, 2016 7:34 AM CST
I cut mine back *hard* about a month ago when I took it to the g'house and it is shooting out now.
Name: Karen
NM (Zone 7b)
Region: New Mexico Region: Arizona Cactus and Succulents Greenhouse Sempervivums Bromeliad
Adeniums Garden Ideas: Level 1 Tropicals Xeriscape Garden Art Plumerias
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plantmanager
Nov 2, 2016 5:38 PM CST
I'll try the scrape test, Daisy. Thank you!
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Name: Karen
NM (Zone 7b)
Region: New Mexico Region: Arizona Cactus and Succulents Greenhouse Sempervivums Bromeliad
Adeniums Garden Ideas: Level 1 Tropicals Xeriscape Garden Art Plumerias
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plantmanager
Nov 3, 2016 3:34 PM CST
Sad The scrape test shows all brown on the stems. Any chance it could return from the roots?
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Name: Daisy I
Reno, Nv (Zone 6b)
Not all who wander are lost
Garden Sages Plant Identifier
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DaisyI
Nov 3, 2016 3:50 PM CST
It might. Dig down a bit and see if you see live roots.
Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and proclaiming...."WOW What a Ride!!" -Mark Frost

Webmaster: osnnv.org
Name: Karen
NM (Zone 7b)
Region: New Mexico Region: Arizona Cactus and Succulents Greenhouse Sempervivums Bromeliad
Adeniums Garden Ideas: Level 1 Tropicals Xeriscape Garden Art Plumerias
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plantmanager
Nov 3, 2016 3:59 PM CST
Thanks, Daisy, I will.
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Name: Carol
Santa Ana, ca
Sunset zone 22, USDA zone 10 A.
Charter ATP Member Hummingbirder Lover of wildlife (Black bear badge) Orchids Region: California Plant Identifier
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ctcarol
Nov 4, 2016 7:37 PM CST
I guess they are a true tropical! mine has never gone completely dormant. It does loose leaves, but not all of them. It's been in the same 12" hanging pot for at least 12 years...hanging from my porch awning. I do have to root prune and refresh soil every couple of years. We very rarely get even light frost here though.

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