Angraecum? Black leaves falling off
Login
User Name
Password   


Registration is FREE. Click to become a member of OrchidBoard community
(You're NOT logged in)

menu menu

Sponsor
Donate Now
and become
Forum Supporter.

Angraecum? Black leaves falling off
Many perks!
<...more...>


Sponsor
 

Google


Fauna Top Sites
LOG IN/REGISTER TO CLOSE THIS ADVERTISEMENT
  #1  
Old 11-22-2019, 10:17 PM
Jenn4a Jenn4a is offline
Senior Member
 

Join Date: Dec 2014
Zone: 5b
Location: Indiana
Age: 26
Posts: 223
Angraecum? Black leaves falling off Female
Default Angraecum? Black leaves falling off

Iím not sure whatís wrong with this guy.
I water it every week or every other week and let the water sit in the tray. The room which it was in typically is hot and dry because I use T5HO. I moved my angraecums downstairs near some led lights for now, where itís much cooler.
Iíve sprayed it with physan a month or so, but the leaves keep turning black and falling off. There is good circulation, from a swiveling fan.
Iíve also put in some rootblast fertilizer a week ago.

I avoid getting the leaves wet otherwise. Both my angraecums have dropped leaves, but currently the other one doesnít have any black leaves. Itís just in need of some soaking because itís dry.


I leave my orchids at my house, and I live on campus. I make weekly visits usually. My phals and paphs seem happy. Itís just these guys!

update:
humidity is house conditions with the heater one.
the temperatures range from 68 - 75 (estimated.)

I have an Angraecum eburneum, and a larger NOiD with each leaf being around 12" long. I am not sure of the ID if someone would be willing to take a shot. it is the one pictured. it is down to 5 leaves. I would say that it has lost nearly 10 leaves.

The huge angraecum (NOiD) has lost more leaves since, and my other one is very dehydrated. I agree with the below comments that my watering schedule is less than ideal.
The Angraecum eburneum(not pictured) has only three leaves left, and one of the leaves was cut off due to the black spreading down.
I do notice that the leaf snaps off dry and it doesn't spread to the very center.. the joints remain dry.


I grow carnivorous plants in my apartment, but do not have the space to grow large orchids there. I never intended to hurt my precious babies, and these Angraecums seem to be the only ones with significant issues. I know my growing conditions are less than ideal, but I do plan to build a greenhouse once I graduate and move out of my current apartment. I also grow a few carnivorous plants at the house with orchids, so using distilled water is convienient for me. I did put some slow release fertilizer in all my orchid pots.
Attached Thumbnails
Angraecum? Black leaves falling off-4d9080cd-2bfd-4308-930c-a547fd57fb3f-jpg   Angraecum? Black leaves falling off-b3a020af-3a22-4011-b319-e7f182438225-jpg  

Last edited by Jenn4a; 12-17-2019 at 01:33 AM.. Reason: adding more information
Reply With Quote
  #2  
Old 11-23-2019, 10:33 PM
Leafmite's Avatar
Leafmite Leafmite is offline
Senior Member
 

Join Date: Sep 2010
Zone: 5b
Location: Ohio
Posts: 9,165
Angraecum? Black leaves falling off
Default

Which one is this?

Angraecums are famous for 'fungus' issues. They are both sensitive to fertilizer salts and many of them come from Madagascar which is very breezy. In addition, Madagascar has many different climates ranging from constantly hot (lowlands) to cooler temperatures during the winter (higher elevations) so it is important to know the identity before giving specific advice.

I make certain that mine have a constant source (or two or three) of Calcium (Calcium strengthens the cells and helps prevent fungus infections). I added limestone, oyster shell and egg shell to the pots of all of mine. I water with distilled water or rain water and use Osmocote (sp?) which is a slow-release fertilizer that won't burn the roots. I have mine growing in red lava rock/limestone and basket pots so the roots get plenty of airflow around them (mine are descended from ones that come from breezy Madagascar). I hope this helps.

Here is a pretty good source of information:

Angraecums...

The blog is written by someone who lives in Florida so his advice needs to be taken into context for those of us who live in colder climates.
__________________
I decorate in green!
Reply With Quote
Post Thanks / Like - 1 Likes
Likes Fran20 liked this post
  #3  
Old 11-24-2019, 08:41 AM
Dollythehun's Avatar
Dollythehun Dollythehun is offline
Senior Member
 

Join Date: Aug 2016
Zone: 6a
Location: Northern Indiana
Posts: 4,559
Angraecum? Black leaves falling off Female
Default

Ditto Leafmite. I'll add mho. That medium looks broken down and the plant looks underwatered. I lost mine to disease, probably due to underwatering stress. I can't think of one orchid I own that could thrive on a weekly/biweekly watering.
Reply With Quote
Post Thanks / Like - 1 Likes
Likes Fran20 liked this post
  #4  
Old 11-25-2019, 03:29 AM
SouthPark's Avatar
SouthPark SouthPark is online now
Senior Member
 

Join Date: Dec 2018
Member of:AOS
Location: Australia
Posts: 1,050
Angraecum? Black leaves falling off Male
Default

If it's a case of fertiliser toxicity ----- ie. too much fertiliser accumulated in the growing media, then try repotting in new media - right away.

I am just assuming the issue isn't sunburn. But it appears that the yellowing is one-sided. On one side of the plant only.

Also assuming it's not fungal activity...... but not discounting it.

Agreeing with leafmite and dolly - totally.

---------- Post added at 05:29 PM ---------- Previous post was at 05:13 PM ----------

Quote:
Originally Posted by Jenn4a View Post
I water it every week or every other week and let the water sit in the tray.
Do you have a little separator that keeps the bottom of the orchid pot from touching the tray?

See this : click here.

Also - maybe once a week watering is not enough, which could be the reason for the leaf shapes seen too. Using a airy media with good air-movement in the room can allow you to water maybe every couple of days, or even every day (if you wanted).

Last edited by SouthPark; 11-25-2019 at 03:32 AM..
Reply With Quote
Post Thanks / Like - 1 Likes
Likes Fran20 liked this post
  #5  
Old 12-17-2019, 01:44 AM
Jenn4a Jenn4a is offline
Senior Member
 

Join Date: Dec 2014
Zone: 5b
Location: Indiana
Age: 26
Posts: 223
Angraecum? Black leaves falling off Female
Default

I have added an update to the main post.

Quote:
Which one is this?
The large one pictured is a NOiD. the leaves are around 12" long each. I am not sure which one it is.
I also have a smaller eburneum that isn't doing well.

I too water with distilled water because I have carnivorous plants that need low PPM. That is why I added slow release fertilizer to my orchid pots.

Quote:
That medium looks broken down and the plant looks underwatered. I lost mine to disease, probably due to underwatering stress. I can't think of one orchid I own that could thrive on a weekly/biweekly watering.
I agree that my watering schedule is less than ideal. If I had the space to grow them in my apartment, I would have taken it with me. I can repot both of them if needed. Would repotting stress out the plant more?



Quote:
If it's a case of fertiliser toxicity ----- ie. too much fertiliser accumulated in the growing media, then try repotting in new media - right away.
I am just assuming the issue isn't sunburn. But it appears that the yellowing is one-sided. On one side of the plant only.
Also assuming it's not fungal activity...... but not discounting it.
Agreeing with leafmite and dolly - totally.
the largest orchid bark possible? I'm afraid to stress either of the plants out any further but their conditions keep declining. I do have some orchiata bark; I don't remember which sizes though.

Quote:
Do you have a little separator that keeps the bottom of the orchid pot from touching the tray?
honestly, no I do not.

Last edited by Jenn4a; 12-17-2019 at 01:47 AM..
Reply With Quote
  #6  
Old 12-20-2019, 01:12 AM
Jenn4a Jenn4a is offline
Senior Member
 

Join Date: Dec 2014
Zone: 5b
Location: Indiana
Age: 26
Posts: 223
Angraecum? Black leaves falling off Female
Default

I think the large pictured one may be sesquipedale?!
I donít know which angraecum species have leaves around 12Ē other than sesquipedale, if I could be wrong, let me know. It has two spikes, one is burnt.
Attached Thumbnails
Angraecum? Black leaves falling off-8eeccb16-8e8d-4454-8357-2d11b4aa5465-jpg  
Reply With Quote
  #7  
Old 12-20-2019, 01:25 AM
SouthPark's Avatar
SouthPark SouthPark is online now
Senior Member
 

Join Date: Dec 2018
Member of:AOS
Location: Australia
Posts: 1,050
Angraecum? Black leaves falling off Male
Default

Quote:
Originally Posted by Jenn4a View Post
I can repot both of them if needed. Would repotting stress out the plant more?
It wouldn't stress them out more. It could maybe save them instead. If you do use bark again, then largest possible pieces should be quite ok - since your plant appears to be quite large already.

You could pre-soak the bark a bit in some water, then tip out the water after an hour or so, and drain the bark. The wet bark at least will be wet. Dry bark might just stay dry, and harder to wet when it's dry. Hence the pre-soak before using the bark.

Quote:
honestly, no I do not.
A separator or grate between the bottom of the pot and a dish (if it you a pot dish) will prevent the bottom of the pot from sitting in drainage water. Not sitting in drainage water will be a beneficial thing.


Last edited by SouthPark; 12-20-2019 at 01:52 AM..
Reply With Quote
Post Thanks / Like - 1 Likes
Likes Fran20 liked this post
  #8  
Old 12-20-2019, 01:29 AM
Roberta's Avatar
Roberta Roberta is offline
Super Moderator
 

Join Date: Jun 2008
Zone: 10a
Location: Coastal southern California, USA
Posts: 3,708
Angraecum? Black leaves falling off Female
Default

Quote:
Originally Posted by Jenn4a View Post
I think the large pictured one may be sesquipedale?!
I donít know which angraecum species have leaves around 12Ē other than sesquipedale, if I could be wrong, let me know. It has two spikes, one is burnt.
Angcm. eburneum can also be very large. The leaves of the primary hybrid Angcm Veitchii (A. sesquipedale x A. eburneum) also can be quite large, and other hybrids with A. sesquipedale such as A. Crestwood (Veitchii x sesquipedale) too. Wait for the flowers... A. eburneum has much smaller flowers with short spur, but more of them. A. Veitchii is about halfway between its parents, A. Crestwood looks more like A. sesquipedale (reasonable, being 3/4 sesquipedale), spur is a little shorter but more flowers.
__________________
"Extraordinary claims require extraordinary evidence" Carl Sagan

Roberta's Orchids

What's blooming for Southern California Species hobbyists

Last edited by Roberta; 12-20-2019 at 01:33 AM..
Reply With Quote
Post Thanks / Like - 1 Likes
Likes SouthPark liked this post
  #9  
Old 12-20-2019, 01:59 AM
SouthPark's Avatar
SouthPark SouthPark is online now
Senior Member
 

Join Date: Dec 2018
Member of:AOS
Location: Australia
Posts: 1,050
Angraecum? Black leaves falling off Male
Default

Quote:
Originally Posted by Jenn4a View Post
I did put some slow release fertilizer in all my orchid pots.
That could do it too ------ the leaf burning thing - if it is over-done that is. I personally go for just fertilising (weak liquid fertilisation) once a month - no slow release stuff. But I have certainly seen slow release fertiliser used in some pots - such as for catasetum plants. I don't use it myself though.
Reply With Quote
  #10  
Old 12-20-2019, 07:36 AM
Dollythehun's Avatar
Dollythehun Dollythehun is offline
Senior Member
 

Join Date: Aug 2016
Zone: 6a
Location: Northern Indiana
Posts: 4,559
Angraecum? Black leaves falling off Female
Default

Being truthful here, hopefully not hurtful: Rereading your original post, you have a hot environment from the t5s, you can only water weekly or biweekly, and you have only normal household humidity.

I would rehome the plants and grow something more forgiving until you graduate.
Reply With Quote
Reply

Bookmarks

Tags
angraecums, black, itís, leaves, week


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Black Spots on leaves, please help! Sara1fly Pests & Diseases 8 06-18-2014 12:27 AM
brown and black spots on Mtssa. pseudo bulbs and leaves stargazie Pests & Diseases 2 04-07-2014 01:27 PM
Phal + Semi-Hydro + Black Spots Underside of Leaves + Problem empiref Pests & Diseases 2 01-11-2014 03:39 AM
Phal problem - bases of leaves turn yellow, stem black AnnieM Pests & Diseases 5 03-09-2011 11:24 AM
Aerangis modesta black dots on leaves Beckster Vanda Alliance - Angraecum/Aerangis 1 03-19-2010 10:14 AM

All times are GMT -4. The time now is 07:57 PM.

© 2007 OrchidBoard.com
Search Engine Optimisation provided by DragonByte SEO v2.0.37 (Lite) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
Feedback Buttons provided by Advanced Post Thanks / Like (Lite) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.

Clubs vBulletin Plugins by Drive Thru Online, Inc.