A. griffithii v.pradhan

[Adam Fikso]

Hello all. I was delighted to see--just now-- the emerging cataphyll sheath
of A. griffithii, v. pradhan.  So, I can confirm that it is probably hardy
in Zone 6.  I am in Zone 5a, but the winter was relatively mild, with only 2
nights of 0. F weather, during a two-week period of single digit weather
where the range was from 0 to 13F.  The tuber was planted about 8" deep in a
clayey loam that has had occasional fertilization during the last  3 years.)
The bottom of the hole was  amended with  a handful of gypsum and pea gravel
in the bottom, dug in for about another inch or two.

There was a recent question about  A.griffithii's hardiness, so this should
be useful information.  The tuber was planted about 4.5 feet from the
concrete block foundation of my house on the east side, where it is warmed
by morning sun.  Radiant ground heat from the basement and the house
foundation is regarded as too far away to have made  much more than a
minimum difference.   In this area, the frost line is regarded as at least 4
feet below ground, for the location of water pipes, etc..

The height of it is about 4" which suggests that it came up with the
sikokianum, the SikoTak, and a day or two before the earliest triphyllum I
have--unless, of course,it grew 4" overnight.  Of course this raises the
question as to whether there is much data on the growth rates of these
things.  Please, Ray, Don't send me to the Archives, as I have not been able
to find anything there rapidly enough, even if it is there.  I'm willing to
do my homework, but basically, I'm still a 3" x 5 card" man,  or maybe
Hollerith cards, even..

Happy growing, Adam Fikso-- in Glenview, IL.