NOW Plumbing vs. natural leaf withering and dormancy
penstemon (Thu, 15 Jan 2015 09:23:54 PST)
On the other hand, a leaf that has tip dieback usually looks healthy and
green for much of its length, and the tip is completely withered as if
somebody had held a match to it.
If the condition causing the tip dieback is corrected right away, the dieback will stop.
Bob Nold
Denver, Colorado, USA