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Old 07-14-2017, 09:53 AM
 
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I planted this rhodidenum last fall and it has looked fine until the last several weeks when it's been hot and dry here in Virginia.

There are growing yellow leave and some totally brown leaves. How would I know if the plant is dry or is it being underwatered?

I have been giving it about 2 1/2 gallons every two or threee days for the last week or so. Thanks

Last edited by Rickcin; 02-14-2021 at 08:05 PM..
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Old 07-14-2017, 10:20 AM
 
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Rhododenrons usually need mulch to keep the rootball moist and cool. If the roots get dried out, it's hard to get the water into the plant. If the leaves are curling, it usually means that the plant isn't getting enough water.
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Old 07-14-2017, 12:51 PM
 
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Quote:
Originally Posted by Nicci6Squirrels View Post
Rhododenrons usually need mulch to keep the rootball moist and cool. If the roots get dried out, it's hard to get the water into the plant. If the leaves are curling, it usually means that the plant isn't getting enough water.
I do have the rootball covered with black mulch. Also, the leaves are not curling st all, but they are turning yellow.
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Old 07-14-2017, 02:17 PM
 
Location: Florida
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Check the soil by digging down a couple of inches. If the soil is dry, increase your watering to every day if it's hot there. Broadleaf evergreens get yellow leaves, my laurels get them occasionally, but are putting out lots of new growth and get copious amounts of water. Your rhodie looks like it's in full sun. They appreciate some shade when it gets hot.
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Old 07-14-2017, 02:21 PM
 
Location: Georgia, USA
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Default Care of rhodies

https://www.gardeningknowhow.com/orn...ron-leaves.htm
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Old 07-14-2017, 03:23 PM
 
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Quote:
Originally Posted by Taz22 View Post
Check the soil by digging down a couple of inches. If the soil is dry, increase your watering to every day if it's hot there. Broadleaf evergreens get yellow leaves, my laurels get them occasionally, but are putting out lots of new growth and get copious amounts of water. Your rhodie looks like it's in full sun. They appreciate some shade when it gets hot.
Good suggestion with the soil and I will do what you've advised. The rhody is under a large tree and does get filtered shade. There is a rhody about 8 feet away on the other side of the large tree and it is doing fine.
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Old 07-15-2017, 06:28 PM
 
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I have a personal thing about the black and red etc mulches. Anyone think they are a problem?
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Old 07-15-2017, 08:04 PM
 
Location: East of Seattle since 1992, 615' Elevation, Zone 8b - originally from SF Bay Area
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Rhodies don't like mulch close to the base. You should leave it 2-3" away. For yellowing, a good treatment is Epsom salts dissolved in water, 1 tablespoon to a gallon every couple of weeks until it greens up.
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Old 07-16-2017, 12:02 AM
 
Location: Swiftwater, PA
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Quote:
Originally Posted by Hemlock140 View Post
Rhodies don't like mulch close to the base. You should leave it 2-3" away. For yellowing, a good treatment is Epsom salts dissolved in water, 1 tablespoon to a gallon every couple of weeks until it greens up.
One of our issues where I live is the Rhododendron Borer: Rhododendron Borer — Department of Entomology — Penn State University. Do you have any problems with them on the West Coast?
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Old 07-16-2017, 05:53 AM
 
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Quote:
Originally Posted by cully View Post
I have a personal thing about the black and red etc mulches. Anyone think they are a problem?
Lately, I have been using a Lowes product called Clay Breaker with Gypsum. It claims the gypsum softens up clay soil adds nutrients and can be used as a mulch.

Are there any others out there who use this product and can testify as to its benefits??
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