On 11/06/2016 08:13, BobHobden wrote:
"Spider" wrote

BobHobden wrote:
"Roger Tonkin" wrote

An update on my phal

Having amputated the rotting leaves, after a bit of a sulk it
has now put on a spurt of growth, with a new flower branch on
the old stem, and intriguingly some change to the couple of
aerial roots. These seem to have made a "pinch" at the end then
started to turn green above. Not sure what is happening, but
will watch with interest.

All photo's at http://tinyurl.com/zkfdl57


Healthy roots should look like that with a greenish bit at the end, it
means they are growing.


But, surely, that reddish tinge is a sign of stress? Usually drought
stress, in my experience. The root tip should be green.


Reddish tinge on Phals is normally down to too much light but not
anything to get too concerned about. They take a lot more light than
growers expect in the UK as our sun is so weak compared to where they
grow naturally in this world.


Understood. I'd read somewhere that the stress was down to drought, not
excess light. I usually see it on my phals when I've been a bit tardy
with the watering. I bow to your superior knowledge, as always.

--
Spider
On high ground in SE London
Gardening on heavy clay