Bugs, Mildews, Strange Stuff forum: Help! My Australis roots have a problem!

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GardenGnome
Feb 15, 2013 2:21 PM CST
My Australis Var. Tonga is sick with something, I think. The lower leaves were getting thinner, and one went yellow and fell down. The upper leaves all look perfectly fine.

I noticed this about 2 weeks ago, and 1 week ago I fertilized, thinking it might be a nutrient problem. Today, I thought about checking it's substrate, and carefully lifted some, expecting root resistance (my other Hoyas of the same age have filled their pots), but all I found was loose substrate! I dug some more, and found tiny root pieces, and some larger ones, like the one in the picture!

I dug a little right next to the plant and saw some roots that looked good attached to the plant, but I don't know what to do!

Thumb of 2013-02-15/GardenGnome/eecabf

Thumb of 2013-02-15/GardenGnome/4d5f0e
[Last edited Feb 15, 2013 2:24 PM CST]
Quote | Post #950272 (1)
Imagecpawl
Feb 15, 2013 3:42 PM CST
Name: cindy
Delta, BC,Canada
If it were my plant I would cut the roots off and try re-rooting your hoya.
Probably not what you wanted to hear but I think doing this will give your hoya the best chance.
AlohaHoya
Feb 15, 2013 4:49 PM CST
Name: Carol Noel
Hawaii (near Hilo)
It's all about choices.
If you have some healthy roots but other roots are dead...cut away the dead roots leaving the healthy ones, rinse off the root area, dip into rooting hormone, or Super Thrive and repot into a loose mix, keeping it damp, not soggy. Mist the leaves as often as you can remember, or cover with a loose plastic bag to retain the moisture.

If there are no healthy roots, snip the root area up ...up....up until you snip into healthy stem (it will have white sap), dust with rooting hormone and root again. like cindy said.

Rooting hormone is a good fungicide to prevent rot...but you best get the rotten stuff outa there.
Leap. The net will appear.
GardenGnome
Feb 15, 2013 5:39 PM CST
Thanks! I'll take it out of the pot tomorrow and check what needs to be done.

Is it wise to take a cutting from top of the plant which looks very healthy and plant that also, just in case?

AlohaHoya
Feb 15, 2013 10:56 PM CST
Name: Carol Noel
Hawaii (near Hilo)
It's all about choices.
Good thinking! Take it from a mature part of the plant....not unformed growth.
Leap. The net will appear.
GardenGnome
Feb 25, 2013 8:42 PM CST
I completely forgot to take pictures of the roots when I pulled it out, but all the parts of the Hoya that were under the substrate were bloated. Still, there were a few good white roots, but I decided to trim the plant a little above the substrate, and I made 3 cuttings from the plant. Has anyone had anything like this happen?
AlohaHoya
Feb 25, 2013 10:51 PM CST
Name: Carol Noel
Hawaii (near Hilo)
It's all about choices.
ALL of the time!!!!! Sometimes catch it in time and find some health roots on the stem...so I wash them well (cut off the dead roots), dip in Rooting Hormone and stick in a pot and pray a lot!!! I rerooted a H. rigida withy 8 foot long vine... it looks really iffy for a long while!.

Remember...these really are tough plants with a STRONG will to survive...given the advantages they will pull thru!!!!.

Nice going....GardenGnome...
Leap. The net will appear.
GardenGnome
Feb 26, 2013 11:53 AM CST
After further searching, I think that what my plant was suffering from was a nematode, probably root knot nematodes. I have no idea how that happened, since all of my plants use a very similar substrate with the same ingredients in different quantities, and the rest of them look good (I dug a little on some plants to check the roots, and they all look perfectly good).
plumania
Feb 26, 2013 3:10 PM CST
Name: Alka
South Florida
GardenGnome, is this an Exotic Angel basket? I ask because their plants often end up with mysterious root problem.
Imagecpawl
Feb 26, 2013 5:12 PM CST
Name: cindy
Delta, BC,Canada
I agree I have found almost every EA hoya to be a weak plant.
GardenGnome
Feb 26, 2013 5:53 PM CST
No, bought it locally, along with 4 other Hoyas, which are growing perfectly. Today I dug a little into the pots of the other plants and they had perfect roots.

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