Paph. Leaf Tip Die-Back
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.

Paph. Leaf Tip Die-Back
Many perks!
<...more...>


Sponsor
 

Google


Fauna Top Sites
LOG IN/REGISTER TO CLOSE THIS ADVERTISEMENT
  #1  
Old 12-12-2018, 12:14 PM
aerides aerides is offline
Member
 

Join Date: Feb 2008
Posts: 37
Paph. Leaf Tip Die-Back
Default Paph. Leaf Tip Die-Back

I was having leaf-tip die-back with several paphs when I was growing in NYC. I potted paphs in straight sphagnum and used NYC tap water, which is generally considered very acceptable for orchids. The light was HID but the paphs were off to the side. There was fogger in the room that kept humidity at good levels. Probably was using 20-20-20 at 1/4 strength as a constant feed, monthly flushing with clear water. I remember hearing something about fertilizer salts bonding with sphagnum so they can't be flushed but don't know about this. I can't remember exactly which paph this was, possibly delenatii or a cross. I'm back into orchids at a different location so naturally I want to get paphs! It seems a good time to begin working on insight into this issue. Thanks for any help.
Attached Thumbnails
Paph. Leaf Tip Die-Back-fungus-005-jpg   Paph. Leaf Tip Die-Back-fungus-002-jpg  
Reply With Quote
  #2  
Old 12-12-2018, 05:35 PM
Ray's Avatar
Ray Ray is offline
Senior Member
 

Join Date: May 2005
Location: Oak Island NC
Posts: 9,954
Paph. Leaf Tip Die-Back
Default

I usually chalk that up to either underwatering (or insufficient roots to take it up) or an excess of fertilizer.

Please describe the details of "1/4 strength" and "continuous feeding" - i.e., how much per gallon and how often.
__________________
Ray Barkalow, Orchid Iconoclast
Want Better Plants? READ THIS
shop.firstrays.com

Free Shipping in the US! (see terms & conditions for details)
Reply With Quote
  #3  
Old 12-12-2018, 06:14 PM
WeirdGuySeattle WeirdGuySeattle is offline
Senior Member
 

Join Date: Nov 2013
Posts: 136
Paph. Leaf Tip Die-Back
Default

On these mottled leaf paphs, I have seen leaves die like this when they are growing too cold / wet.
Reply With Quote
  #4  
Old 12-12-2018, 07:21 PM
aerides aerides is offline
Member
 

Join Date: Feb 2008
Posts: 37
Paph. Leaf Tip Die-Back
Default

Quote:
Originally Posted by Ray View Post
I usually chalk that up to either underwatering (or insufficient roots to take it up) or an excess of fertilizer.

Please describe the details of "1/4 strength" and "continuous feeding" - i.e., how much per gallon and how often.
Sure. 1/4 tsp. per gallon of a 20-20-20 type formula used for every watering with a monthly flush of clear water. Thanks for your response.

---------- Post added at 07:21 PM ---------- Previous post was at 07:12 PM ----------

Looking at this plant again, after a rather long period of time, it looks like it's growing "tight." And looking at the way the light is reflected off the leaves, there also seems to be slight puckering on the surface. So maybe a combination of over-lighting, slight underwatering, and excess fertilizer. There's even some bleaching in some of the older leaves.
Reply With Quote
  #5  
Old 12-13-2018, 08:28 AM
Ray's Avatar
Ray Ray is offline
Senior Member
 

Join Date: May 2005
Location: Oak Island NC
Posts: 9,954
Paph. Leaf Tip Die-Back
Default

Quote:
Originally Posted by aerides View Post
Sure. 1/4 tsp. per gallon of a 20-20-20 type formula used for every watering with a monthly flush of clear water. Thanks for your response.
That's about 65-70 ppm N, which is probably OK if used once a week. More often, and I'd cut the rate.

It might be an accumulation issue.

Tell us about the water supply and how long since you're repotted.
__________________
Ray Barkalow, Orchid Iconoclast
Want Better Plants? READ THIS
shop.firstrays.com

Free Shipping in the US! (see terms & conditions for details)
Reply With Quote
  #6  
Old 12-13-2018, 01:09 PM
aerides aerides is offline
Member
 

Join Date: Feb 2008
Posts: 37
Paph. Leaf Tip Die-Back
Default Manhattan Water stats (from 2003)

Quote:
Originally Posted by Ray View Post
It might be an accumulation issue.

Tell us about the water supply and how long since you're repotted.
I don' think the potting mixture was more than a few months old, at most. I dug up my records from those days (15 years ago). I found a note that I called the water department on December 17, 03 and received the following stats:

TDS: average 58 mil/ltr with a range from 28-132.
Potassium average 0.7 mil/ltr
Calcium average 7.6 mil/ltr

Another Manhattan grower noted at the time that the Ca/Mag levels are quite low but sodium content may be a bit high for "sensitive orchids". Also, the numbers above were averaged from both watersheds for NYC but that Manhattan (where I lived) received 90% of its water from the Croton system, which tends to be lower in TDS than the other one in the Catskills. Anyway, probably too much info but I found it interesting. A far different story here in northwestern New Jersey. It's bottled water until I can get my RO system.
Reply With Quote
  #7  
Old 12-14-2018, 08:41 AM
Ray's Avatar
Ray Ray is offline
Senior Member
 

Join Date: May 2005
Location: Oak Island NC
Posts: 9,954
Paph. Leaf Tip Die-Back
Default

Manhattan has some of the purest tapwater in the country, but as you don't grow there any longer, you had better look up your current water authority's reports, to know for sure what you're dealing with.
__________________
Ray Barkalow, Orchid Iconoclast
Want Better Plants? READ THIS
shop.firstrays.com

Free Shipping in the US! (see terms & conditions for details)
Reply With Quote
  #8  
Old 12-14-2018, 11:06 AM
aerides aerides is offline
Member
 

Join Date: Feb 2008
Posts: 37
Paph. Leaf Tip Die-Back
Default

Quote:
Originally Posted by Ray View Post
Manhattan has some of the purest tapwater in the country, but as you don't grow there any longer, you had better look up your current water authority's reports, to know for sure what you're dealing with.
I'm sure. It's awful. So thanks for helping me with the leaf dieback issue. Less heat, a little more water, less feeding. Check! I could check the TDS in the bottled water I'm using, but from looking at the health of roots from other plants, I'm guessing it's fine for most purposes. RO on the way. And three new paphs!
Reply With Quote
Reply

Bookmarks

Tags
orchids, paph, paphs, remember, water


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
paph vangard leaf issues seagull Cypripedium Alliance - Paphiopedilum 5 11-30-2017 12:08 AM
Paph with yellow leaf, yellow/brown spots vpsihop@hotmail.com Pests & Diseases 3 12-23-2016 10:52 AM
The serial Paph killer (wall of text)... The Mutant Beginner Discussion 28 01-21-2015 03:36 AM
Paph Slavador Dali, Leaf Discoloration imacava Beginner Discussion 0 12-15-2010 12:19 AM
Paph leaf spots razka3 Cypripedium Alliance - Paphiopedilum 1 03-18-2008 09:27 PM

All times are GMT -4. The time now is 04:36 PM.

© 2007 OrchidBoard.com
Search Engine Optimisation provided by DragonByte SEO v2.0.37 (Lite) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Feedback Buttons provided by Advanced Post Thanks / Like (Lite) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.

Clubs vBulletin Plugins by Drive Thru Online, Inc.