Ask a Question forum→Hoya white spots?

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Name: SJC
Alexandria, VA (Zone 7a)
I appreciate all the help πŸ’—
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Plantlove8
Jun 6, 2020 4:26 PM CST
I have multiple Hoya plants that I'm very attached to! I've had them for about a year. I just noticed that they have a few white spots on the end of their tendrils. Here are the Hoya compacta:

Before rubbing off:
Thumb of 2020-06-06/Plantlove8/041df3

After rubbing off:
Thumb of 2020-06-06/Plantlove8/7c5db5
So it looks like the white spots are underneath the waxy top coating of the leaves. If I apply pressure to them the white will, sort of, go away but most of it is still present.

I believe it might be mineral salts or calcium from using tap water in our area (guilty). I'll now be using filtered water only. Anyone have any ideas?

These spots also show up on my heart Hoya, and princess Hoya (though to a lesser extent). They're all located in different rooms so I don't think it's an outbreak.

Thank you so much everyone πŸ’—
[Last edited by Plantlove8 - Jul 21, 2020 3:21 PM (+)]
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Name: sumire
Reno, Nevada (Zone 6a)
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sumire
Jun 6, 2020 5:48 PM CST
That's not hard water. Do the white spots have a texture or feel different from the rest of the leaf?

Have you examined this plant in every little crevice and curl for mealy bugs? Or have any of your plants had a mealy bug problem? It might be bugs.
www.sumiredesigns.com
[Last edited by sumire - Jun 6, 2020 5:49 PM (+)]
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Name: SJC
Alexandria, VA (Zone 7a)
I appreciate all the help πŸ’—
Image
Plantlove8
Jul 18, 2020 2:19 PM CST
Hi! Thank you so much for your answer. I don't think that it's mealy bugs. I am familiar with them. The spots are somehow inside the plant, which is very weird.
Name: Daisy I
Reno, Nv (Zone 6b)
Not all who wander are lost
Garden Sages Plant Identifier
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DaisyI
Jul 21, 2020 2:22 PM CST
It might be mildew. Hoya, especially Hoya like compacta, need excellent air circulation or they get mildew. Spray it with a fungicide to see if that helps.
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

President: Orchid Society of Northern Nevada
Webmaster: osnnv.org
Name: Lin Vosbury
Sebastian, Florida (Zone 10a)

Region: United States of America Deer Region: Florida Charter ATP Member Million Pollinator Garden Challenge I was one of the first 300 contributors to the plant database!
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plantladylin
Jul 21, 2020 3:01 PM CST
If it's not mildew, those white markings on the leaves of your Hindu Rope Hoya (Hoya carnosa 'Compacta') may just be normal coloration. Hoya carnosa leaves can be variable, they can be solid green, or green with white to grayish splashes and spots.
~ I'm an old gal who still loves playing in the dirt!
~ Playing in the dirt is my therapy ... and I'm in therapy a lot!


Name: SJC
Alexandria, VA (Zone 7a)
I appreciate all the help πŸ’—
Image
Plantlove8
Jul 21, 2020 3:17 PM CST
@daisyl would mildew be present underneath the leaf?

The white spots are raised but they are underneath the waxy coating of the leaves.
Name: Daisy I
Reno, Nv (Zone 6b)
Not all who wander are lost
Garden Sages Plant Identifier
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DaisyI
Jul 21, 2020 3:41 PM CST
Ok, new thought(s):

You are rubbing off the spots. Don't do that.

Edema - Hoya are waxy so maybe you are seeing 'puddles' under the leaf surface. It occurs when there is more moisture in the plant then it can use or transpire.
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

President: Orchid Society of Northern Nevada
Webmaster: osnnv.org
Name: Lin Vosbury
Sebastian, Florida (Zone 10a)

Region: United States of America Deer Region: Florida Charter ATP Member Million Pollinator Garden Challenge I was one of the first 300 contributors to the plant database!
Garden Procrastinator Birds Butterflies Bee Lover Hummingbirder Container Gardener
Image
plantladylin
Jul 21, 2020 4:11 PM CST
LOL, ignore my last post. The photos show the upper leaf surface. If the white marks are on the reverse ... Shrug!
~ I'm an old gal who still loves playing in the dirt!
~ Playing in the dirt is my therapy ... and I'm in therapy a lot!


Name: SJC
Alexandria, VA (Zone 7a)
I appreciate all the help πŸ’—
Image
Plantlove8
Jul 21, 2020 4:17 PM CST
Sorry! I should have been more clear. It's on the top half of the leaf πŸ’—
[Last edited by Plantlove8 - Jul 23, 2020 6:25 AM (+)]
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Name: Daisy I
Reno, Nv (Zone 6b)
Not all who wander are lost
Garden Sages Plant Identifier
Image
DaisyI
Jul 21, 2020 6:24 PM CST
That makes so much more sense. Edema is usually visible on the bottoms of the leaves.
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

President: Orchid Society of Northern Nevada
Webmaster: osnnv.org
Name: SJC
Alexandria, VA (Zone 7a)
I appreciate all the help πŸ’—
Image
Plantlove8
Aug 25, 2020 7:56 AM CST
Ok so after a ton of research and everyone's comments above I believe these white spots are just normal Hurray! thanks for helping me troubleshoot everyone!

πŸ’—the Overly Crazy Plant Mom

Thumb of 2020-08-25/Plantlove8/f51ca5

Name: Lin Vosbury
Sebastian, Florida (Zone 10a)

Region: United States of America Deer Region: Florida Charter ATP Member Million Pollinator Garden Challenge I was one of the first 300 contributors to the plant database!
Garden Procrastinator Birds Butterflies Bee Lover Hummingbirder Container Gardener
Image
plantladylin
Aug 25, 2020 9:32 AM CST
Oh yes, that close up shows normal leaf coloration!
~ I'm an old gal who still loves playing in the dirt!
~ Playing in the dirt is my therapy ... and I'm in therapy a lot!


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