Re: REB:Rebloom Defined ???

Autmirislvr@aol.com wrote:

In a message dated 9/3/2004 8:48:59 AM Central Standard Time, laurief@paulbunyan.net writes:



the Judge's Handbook (which provides the only published reblooming guidelines of which I am aware)



Chapter 7 of The World of Iris, authored by Raymond G. Smith is on rebloom.

Excerpt: Rebloom-Definition (page 137 of TWOI)

A rebloomer may be defined as any iris that produces an extra period of full bloom each year. By full bloom is meant bloom of one or more increases from each rhizome that flowered during the immediately preceding regular period. This definition excludes those sorts whose stalks emerge serially over an extended season as well as clones with only a fraction of the mature rhizomes blooming during one period and the remainder during the next, even though such sorts do provide color apart from regular seasons and are frequently mislabeled rebloomers.

Is there something more or different in the RIS bylaws? I don't have a copy. Clarence? Rosalie? Mike?


Betty W. in South-central KY Zone 6
Bridge In Time Iris Garden@website:
www.thegardensite.com/irises/bridgeintime/
Reblooming Iris - Home Page



Quoted from the Reblooming Iris - Home Page:

Reblooming irises produce more than one growth of bloom stalks in a single growing season. Rebloom cultivars having just a sporadic tendency to rebloom are called *Occasional Rebloomers.*

The *Cycle Rebloomers* complete two distinct cycles of growth, blossoming and increase in one growing season and produce the second cycle of bloom stalks from maturing new increases. The second growth and bloom cycle, usually beginning in later summer or early fall, does not vernalization (a chilling period), although cool nights seem to promote more rebloom.

Rebloomers are found in bearded iris (MDB, SDB, IB, MTB, BB, and TB) as well as beardless varieties. Beardless varieties which rebloom are called *Repeaters*. They produce additional bloom stalks from old growth. Repeaters rebloom immediately following initial production of spring bloom, though sporadically from year to year. Repeaters can extend the regular spring bloom season from four to eight weeks.

There are even a small number of rebloomers that are *Continuous Rebloomers* or *All Season Rebloomers *that send up bloom stalks throughout the growing season whenever a rhizome or its new growth has sufficiently matured. Their bloom time is not controlled by day length, but by soil temperatures.

Spring only bloomers that produce reblooming seedling if crossed to a rebloomer are called *Rebloom Carriers.
*

*This is the crieria I would use to report rebloom to RIS
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*The judges handbook should be used to judge iris though I doubt there are more than a few instances of rebloom being judged in a garden.
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*T.W.O.I. is a reference book not a rule book.
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*The RIS criteria is the most current and certainly the most comprehensive so that is what I use as a personal guidline.
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*Michael M. Stockton Ca. where rebloomers flourish :-)
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