Re: Re: CULT: fertilizer

Has anybody experimented with different sources of
nitrogen for their
irises?

Linda Mann east Tennessee USA zone 7/8




I haven't really experimented but I purchased my
first Iris in 1994 (an introductory collection of
8 from Cooleys).  They bloomed nicely the first
year.  They just sat there in 1996 and 1997.  I
decided they were a waste of money and time.   I
had always used 10-10-10 fertilizer at the
recommended nitrogen rate for lawn grass from my
soil tests.  My soil is so sandy that when I
watered it all washed away.

Then in 1997 I started using time-release Osmacote
14-14-14 in all my beds.  In 1998 the iris were
magnificent and I became hooked.  The new ones I
planted in the fall of 1998 bloomed and rebloomed
in 1999.  They are nice clumps now and several
have bloom stalks.  I attribute the difference to
the Osmacote and regular watering through our dry
periods in the summer.

I haven't tried Arils but think my normal growing
conditions would probably suit them.

Martha
M Brown
NW Oklahoma, USA
USDA Zone 6b,  Sunset Zone 35
Sandy soil, pH 7-7.5
Frost free about April 15 to October 15,
Average summer temperatures 90*F - 100*F,  Extreme
about 115*F
Average daily winter lows  about 20*F, Extreme
about -5&F
Wind-year round daily average about 10mph.





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