Cymbidium seedling leaf tips turning brown

[orchids3]

Believe what Des has posted is right on the mark. Myself I like to use 50% CHC and 50% Stalite Gravel. CHC and Pearlite works pretty well too. I use either a saucer under my pots or a pot with a resevoir. Thats probably what some would call semi - Hydroponic. Spag is deffinately out with my cymbidiums.

[orchids3]

What is the cross? Do they have can canaliculatum in their gene pool - in that case advise about watering practices are differant!

[Des]

Originally Posted by Tsuchibuta

Here is a sample of what I've been talking about, I recieved them as part of a lot I bought from a nursery going out of business. They were already planted in the sphagnum when I got them a few months ago and they were really healthy so my experience has taught me that it is usually better to leave well enough alone. I think I will begin repotting them in coco husk chips, (that's what I grow most everything else). Anyway thanks for the info. I know Des says that he grows them hydroponically, I wonder if semi-hydo would work as well.

Semi hydroponics will work very well for Cymbid seedlings
Regards Des

[Des]

Originally Posted by Tsuchibuta

Here is a sample of what I've been talking about, I recieved them as part of a lot I bought from a nursery going out of business. They were already planted in the sphagnum when I got them a few months ago and they were really healthy so my experience has taught me that it is usually better to leave well enough alone. I think I will begin repotting them in coco husk chips, (that's what I grow most everything else). Anyway thanks for the info. I know Des says that he grows them hydroponically, I wonder if semi-hydo would work as well.

Looking at your pics I would say that that is a fungus infection . After trimming the leaves spray those plants with a systemic fungicide and thereafter with a contact fungicide every two weeks
, don't only spray the plants but the whole growing area, on a regular basis.

[William Jeff Trimble]

Looks like a fugal problem. What is the cross? Is it a hybrid with an Aust. species? Try drying them out a little.

[stonedragonfarms]

That's what I was thiniing too William--the plants look like they might have either madidum or caniculatum as a parent (thick leaves, rounded tips...etc) I'm wondering if it's perhaps fungal and too much water; most of the AU cymbids should be grown pretty dry for the next few months...though I only have 2 of this type in my collection...Des, what say you?

[Des]

Originally Posted by stonedragonfarms

That's what I was thiniing too William--the plants look like they might have either madidum or caniculatum as a parent (thick leaves, rounded tips...etc) I'm wondering if it's perhaps fungal and too much water; most of the AU cymbids should be grown pretty dry for the next few months...though I only have 2 of this type in my collection...Des, what say you?

I agree that looks fungal to me . I would take them out of the sphagnum and repot into an open well draining CHC mix I would not withhold water.
During cool weather try not to wet the leaves ,but do water the roots . This is why I like my hydroponic set-up because during cool weather the sprayers will not activate, but the drippers which are pushed into the media will continue to water.I also make sure that my feed water is not colder than 16 degrees C.
It is difficult for me to give a few plants special treatment as I have about 2000 plants , but I rarely have a problem

[Tsuchibuta]

Sorry my cable was out so no internet yesterday to check back at the thread. Anyway it is madium x tigrinum. I thought it might be fungal, and was wary letting them dry out because it seemed the ones with the damage were the ones that were the most dry. Anyway I think I will be repotting though as I have had problems with shag in the past. thanks for the advice, it definately helps.

[William Jeff Trimble]

Yes, That makes sense. Also, tigrinum is really bad for overwatering problems! Match that up with the other parent and you will need a quick drying potting medium.

Jeff

[Des]

Jeff , for some time now I have stopped using the word "dry or drying " in the same sentence as the word "Cymbidium", due to the fact that some folks think this means completely dry.
Because of what folks read in some books on growing Cymbids I have spent a lot of time convincing some growers that cymbidiums should never dry out . The power of the written word is indeed mightier than sword
Especially when it is miss-understood .