Peder_sahlin 2007-02-15 22:15:34
I have a large Vanda where the leaves have some fungus spots and now
appear to be turnin yellow and falling off. I have seen this before
on Vanda’s and have not had much luck with them. It appears that the
crown where the lower roots come in gets some kind of rot / fungus
and then it just continues to move along up the apex to the crown.
Does anyone have a solution – I use Physan and Thiomil to control
Fungus. This just started a week or so ago and I would like to save
Maureen 2007-02-15 22:18:52
It sounds like you have done the most important steps – I would keep up with applying the fungicides. Also, I would keep the roots well hydrated, but avoid wetting the growth stem. A photo may help list members provide more advice, if you can post one in the photos section.
Deborah reed 2007-02-15 22:19:51
I have just started with a small orchid collection. They all seem to be
healthy, not over-watered or under-watered. But the tips of the leaves
are turning brown on two of them. What does this mean? Thank you
Pat 2007-02-15 22:21:53
Your plant is not getting enough water. The spots on the leaves are secondary to that probably. When leaves – especially if they are not healthy – start to fail they are suseptible to stuff. You can also get marks on the vandas which are not fungal, but due to cold temps.
Since you do not have sucess with Vandas, I do think that you are not watering them enough. Shriveling leaves, yellowing leaves and dropping leaves is a classic symptom for these plants that you need to give more water or water more thoroughly and check the roots. And this starts at the bottom (toward the stem) where you indicate and go up. I have around 20 vandaceous plants and they all do great, but luckily an orchid friend told me this when he saw my first one start looking peaked. Sometimes I will lose some leaves as you describe as a new plant is getting established.
You also may be keeping them in too cold of temps. Well, just two things you might look into.
Good luck, I hope this helps!
Tom neck 2007-02-15 22:27:27
Orchids in nature evolved with, dew and rain water as thier source of water.
Some orchids are very picky about the quality of water they recieve. If the
water quality is not good, the leave tips will turn brown. If you are using
tap water, i suggest using rain or some kind of filtered water that would
lessen the amount of dissolved substances in the water. If you live where
you get snow, you can melt it and use it also.
Deborah reed 2007-02-15 22:27:44
THank you so much. I do use distilled water at room temp. But I have not
used fertilizer. Perhaps fertilizer will rejuvenate them.
Tom neck 2007-02-15 22:28:04
distilled water is good. If you water quality is good, then it can”t be
your water. Other reasons for leaf tip dieback is dry roots. You may not be
watering enough, or allowing them to dry for longer periods then they are
used to. If you have a name for the two orchids that you have with leaf tip
dieback, that would help.
Eva 2007-02-24 01:44:01
What orchids do you have? My Onc. Sharry Babies’s leaf tips always turn
brown, no matter what I do. The plant still blooms and lives on, but I’ve
never been able to figure out why.
Note on caution on fertilizer – get specific orchid fertilizer, and less is