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New growth turned black and dried up

This is a discussion on New growth turned black and dried up within the Orchid Ailments / The Compost Pile forums, part of the Orchid Culture category; The new growth at the base of my cattelya turned black and dried up. I ...

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  1. #1
    Orkala's Avatar
    Orkala is offline Senior Member
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    Unhappy New growth turned black and dried up

    The new growth at the base of my cattelya turned black and dried up. I don't know how to save her. I purchased her last October and she was in bloom. I don't want to loose her. She was one of my expensive orchids. Can someone please advise how to get her healthy again?
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  2. #2
    chemist's Avatar
    chemist is online now Senior Member
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    Thats ok, thise parts where you pointed with an arrow usually dry off at some time. As far as your new leaf is on your new growth is fine. At some point all all those i don't know their name lol. All that covering material will become dey and papery. So you will have only bulb with leaf/leaves.

    ---------- Post Merged at 07:27 PM ----------

    Well, i just noticed you have two arrows. So on one of them new growth dried up and felt off?
    It happened to me ones two. And had no idea why. Maybe water got inside and got rotten. When you water you dont want get new growth wet.

  3. #3
    Orkala's Avatar
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    I grow my orchids outside in a pergola. I water them with the sprayer which is attached to the garden hose. Yes the entire plant gets watered. I went ahead and moved this one into my screen porch. I will keep an eye on it and water it manually. Thank you for the advise.

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    If the blackening started at the base, it's likely an infection of some sort. If it started more at the tip of the new growth, and moved downward, it might be indicative of a calcium deficiency, but that would likely have to be a serious deficiency - zero for many months.

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    I have found that some of my Cattleyas are quite demanding with the Calcium. I lost a few growths this winter as the Cattleyas were really growing under the T5HO lights so I ordered a Calcium supplement and that seems to have taken care of the problem.

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    I grow under T5HO also but did not have any problems with Catts. What water, fertilizer do you use?

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    Orkala's Avatar
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    I water it with the garden hose and I use 20/20/20 fertilizer. I don't like what it is potted in. It is some sort of little rocks and the pot is always heavy, so I can't tell when it needs water. Is there no calcium in the fertilizer?

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    Quote Originally Posted by Orkala View Post
    Is there no calcium in the fertilizer?
    You'd have to read the label to determine that. Most fertilizers do not contain calcium, as it is expected that there is a sufficient supply in the water. It is important that one considers water & fertilizer together when deciding on your feeding regimen.

    Having said that, I now speculate that the rot was likely caused simply by water sitting in the bends and folds at the new growth, and that allowed a bacterial or fungal rot to take over.

  9. #9
    chemist's Avatar
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    You have to read label on your fertilizer. 20/20/20 or other numbers in set of three numbers it tells you how much Nitrogen, phosphorus and potassium in the mix. You have to see what kinf of nitrogen is in the mix, it usually says urea nitrogen or ammonia/nitrate nitrogen. They say orchids does not like urea so you nees to find one with out urea.
    After main ingridient of N, P and K they list on label other microelements such as calcium, magnezium, cupper etc. Check your label for that. From what i heard regular tap water has enough Calcium for orchids unless its ones that require a lot of calcium.

    If you dont like your potting medium you can repot but do it when you see new growth and new roots are started to grow. Other time is not good to repot catts.

  10. #10
    Orkala's Avatar
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    I am watering this cattleya a little less. I think I may have been watering a little more often because I didn't believe the rock medium could keep enough moisture. I will be keeping an eye on it for new roots, because I really want to repot it with bark medium. Thank you for your reply and help.

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