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■(TB) 'Avalanche'

1975, Williamson

'Avalanche' ( Bryce Williamson, R. 1973). Seedling 1368-2. TB, 33" (84 cm), Early midseason bloom. Ruffled satin white self, no influence of blue or yellow; vivid golden orange beard tipped lemon. 'Craftsman' X 'Launching Pad'. Pacific Coast Hybridizers 1975.

Note: Not to be confused with the SPX 'Avalanche'.

See below:


From AIS Bulletin #217 April 1975 Introducing AVALANCHE (Bryce Williamson). A sparkling and pure white self except for the vivid and startling yellow-orange beard tipped lemon. Three and four branches and terminal with double buds. A healthy plant that grows and blooms freely from Craftsman X Launching Pad. I am using this heavilY with red-bearded whites. HC '74. $25.00. Pacific Coast Hybridizers.


Quick Summary of Cultural Directions

Hardiness Zones 4-8 for most varieties, Some cultivars tolerate colder, others tolerate warmer zones (please comment in comment box with your location if this cultivar grows well in zone 3, 4, 9, or 10.)
Exposure Prefers full sun for optimal performance, may still bloom in half-day shade
Water: Prefers well drained good garden soil, Tolerant of dry conditions in established plants, Intolerant of swampy conditions.
PH Prefers Neutral to basic solis 6.1 to 8.5, quite toleranr of more extreme conditions
Fertilizer Prefers rich conditions on relatively inorganic soils.

BobPries - 21 Apr 2019

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Interested in Tall Bearded Iris? Please visit: Tall-bearded Iris Society Website

Your Observations Are Valued. Please make note of bud count, branching, purple based foliage and bloom time, etc. Because these are affected by climate, note date, year and geographic location and write these and other comments in the comment box below.


-- BetsyHiggins - 2010-09-19
I Attachment Action Size Date Who Comment
avalanche01.JPGJPG avalanche01.JPG manage 684 K 13 May 2018 - 01:27 Main.TLaurin Photo scanned from the Larry Harder slide collection
Topic revision: r11 - 16 Apr 2022, TLaurin
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