Dandrobium
Well-Known Member
Hey all!
I've had a problem for over a year with my phrags leaves developing small brown spots near the tip of the newest leaf. These spots will eventually coalesce as they gradually move down the leaf. Cutting the leaf tip seems to slow the process down, or at least stop the spotting until a new leaf emerges from the crown. I originally had my phrags in a traditional medium of small-medium bark or CHC, perlite, charcoal. Now, most of them are in semi-hydro, but the problem remains. This affects certain types more than others. The most affected are my pearcei, kovachii, hanne popow. Somewhat affected is kovachii x richteri. No effect (so far) is Don Wimber x 2, Fritz schomburg. I just picked up some nice besseae & crosses from John M, so I'd like to get this solved soon!
I water with rain water (1:5000 physan) and around 150ppm of MSU or Miracle gro 12-4-8 + micros & Cal-Mag. I alternate with just rain water every second watering. Kelp & humic acid every month or so. Fish fertilizer every month or so.
I posted pictures in the link below.
http://s1152.photobucket.com/user/Dandrobium/library/Phrag%20Leaf%20Tip%20Spotting
The only other post I could find with similar pictures on ST was here: http://www.slippertalk.com/forum/showthread.php?t=36125
It was recommended that reduced light and more frequent watering may help. In my case, I top up the s/h reservoirs with rain water every morning.
Currently my phrags are about 1-2ft away from a large east window. No supplemental light. The sunroom faces east, with a small south window. RH is 60-70%, temps are from 68F to 88F in summer, but now dropping 5F or so from season change :sob: . It does get fairly bright in the morning, but thats for about 3 hours a day, then it is bright filtered light afterwards. Tower fan runs 24h a day.
Has anyone seen this type of spotting, and if so, what have you done to rectify it?
Many thanks!
I've had a problem for over a year with my phrags leaves developing small brown spots near the tip of the newest leaf. These spots will eventually coalesce as they gradually move down the leaf. Cutting the leaf tip seems to slow the process down, or at least stop the spotting until a new leaf emerges from the crown. I originally had my phrags in a traditional medium of small-medium bark or CHC, perlite, charcoal. Now, most of them are in semi-hydro, but the problem remains. This affects certain types more than others. The most affected are my pearcei, kovachii, hanne popow. Somewhat affected is kovachii x richteri. No effect (so far) is Don Wimber x 2, Fritz schomburg. I just picked up some nice besseae & crosses from John M, so I'd like to get this solved soon!
I water with rain water (1:5000 physan) and around 150ppm of MSU or Miracle gro 12-4-8 + micros & Cal-Mag. I alternate with just rain water every second watering. Kelp & humic acid every month or so. Fish fertilizer every month or so.
I posted pictures in the link below.
http://s1152.photobucket.com/user/Dandrobium/library/Phrag%20Leaf%20Tip%20Spotting
The only other post I could find with similar pictures on ST was here: http://www.slippertalk.com/forum/showthread.php?t=36125
It was recommended that reduced light and more frequent watering may help. In my case, I top up the s/h reservoirs with rain water every morning.
Currently my phrags are about 1-2ft away from a large east window. No supplemental light. The sunroom faces east, with a small south window. RH is 60-70%, temps are from 68F to 88F in summer, but now dropping 5F or so from season change :sob: . It does get fairly bright in the morning, but thats for about 3 hours a day, then it is bright filtered light afterwards. Tower fan runs 24h a day.
Has anyone seen this type of spotting, and if so, what have you done to rectify it?
Many thanks!