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Re: Questions on Siberians and Japanese Irises.

  • To: Multiple recipients of list <iris-l@rt66.com>
  • Subject: Re: Questions on Siberians and Japanese Irises.
  • From: Curt Marble <cmarble@tiac.net>
  • Date: Sat, 14 Feb 1998 05:47:54 -0700 (MST)

At 10:37 PM 2/13/98 -0700, you wrote:
>william b. cook wrote:
>>      Griff's message about his Irises staying green all winter reminded me
>> to ask this.  On all the Siberian and Japanese Irises (about four of each)
>> I brought to Florida with me, all of the foliage is brown.  (The lowest
>> temperature was 25 F on Jan. 1).  So far, I cannot detect any new growth at
>> the base of the plants, but when I tug the dead leaves, the plants feel
>> firmly in place.  We are still frequently having night temperatures dipping
>> into the mid to high 30's F (1 C to 4 C), so I guess this could slow them
>> down.
>>      My questions are:
>> 1.   Are the plants dead?
>> 2.  Should I cut back the dead leaves and then feed them with Miracid?
>> 3.  Should I cut back the dead leaves (has to be done anyway) and wait and
>> see what happens?
>>      I know that there is significant chance that these Irises will not
>> last here anyway.

Most of the Massachusetts group cut their Siberians and Japanese *way* back
(to 1" or so) in the fall and burn or bag the foliage.  This is done so that
any possible borer eggs will be destroyed.  I also do this with the few
beardeds I have on the same principle.

Kathy Marble     
Harvard, MA   zone 5

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