RE:CULT: overhead watering vs rainfall

    I haven't seen any differences between overhead watering and drip in
regards to iris rot, I use one or the other(and sometimes both)in different
areas of the garden. Rot for me has been a product of saturated soil and
plants not in active growth because of very high or low temperatures. So by
this I mean too much rain in winter coupled with not enough drainage, blown
leaves keeping soil wet etc. OR by over watering in very hot weather
particularly with transplants and the their limited root systems. In both
cases the Iris are not growing much and can't make use of all the water. So
if rainfall in summer ( I have to guess here since we don't get ANY) is
better than irrigation I would guess that the rainfall come at times of
lower temperatures so the iris are growing, and that in areas with summer
rainfall people tend to water only when there has been a long hot dry spell
- and the iris are not growing.

Chad Schroter
Los Gatos CA Zone 9 - Just like Australia only the months are all
different...

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