RE: TB: When to Divide Clumps?

Thank you, Colleen --

I have serious space limitations where I live, so I cannot have everything I'd
like; however, I have managed to fit in quite a few TB irises. I never
realized certain cultivars might never need to be replanted!

I appreciate your taking time out to give me the scoop.

Mike, Zone 8

________________________________

From: owner-iris@hort.net on behalf of Colleen Modra
Sent: Tue 6/13/2006 5:05 PM
To: iris@hort.net
Subject: Re: [iris] TB: When to Divide Clumps?



Mike

It's best to divide a clump before the rhizomes all start crowding each
other and you end up with a lot old dead rhizomes in the middle and rhizomes
on top of each others. How long this takes depends on the cultivar. For
something that increases quickly like Doubleshot or Epicentre this will be
only a few years. On the other hand Hello Darkness might never need
transplanting.

Colleen Modra
Adelaide Hills
South Australia

colleen@impressiveirises.com.au
www.impressiveirises.com.au



----- Original Message -----
From: "Williams, Michael" <Michael.Williams@hgtc.edu>
To: <iris@hort.net>
Sent: Wednesday, June 14, 2006 5:50 AM
Subject: [iris] TB: When to Divide Clumps?


>I recently visited a daylily nursery, and on one of the "facts
> brochures" they provided, they said that a clump of daylilies should not
> be divided until it has around 20  fans. I have never seen any number
> like this associated with iris clumps, but I have some second and third
> year clumps which I am not sure I should keep intact or separate. They
> all have nice healthy big rhizomes which have grown on all sides of the
> long expired mother rhizome, so should I assume that these rhizomes will
> reproduce their own fans as well? They all have room to spread out.
>
>
>
> How big does a clump get before you decide for sure that it is time to
> divide it? Any advice you can give me?
>
>
>
>
>
> Mike, Zone 8
>
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