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About the plant What it is and where it grows — not part of any germination protocol.
Habit rhizomatous geophyte Plants of the World Online
Flower Yellow Flora of China
Native range China North-Central, China South-Central GBIF Backbone Taxonomy Toxicity is noted only where a source states it. No note here is not a finding of safety.
Sources: Plants of the World Online — Royal Botanic Gardens, Kew; Flora of China — Wu Zhengyi, Peter H. Raven and Hong Deyuan (eds.); GBIF Backbone Taxonomy — Global Biodiversity Information Facility.
Worth knowing Named for the botanist and explorer Ernest Wilson, who found it in western Hupeh, China, growing in grassland near Fang Hsien at about 7,000 feet. Wikipedia: Iris wilsonii For a May 3 last frost, start this around March 1, 2027 — about 2 months ahead.
Using a national average last frost of May 3, which is wrong for most places. Put in your zip code for your own dates. Plant words explained .
Protocol N. C. Deno, 1993 Difficulty Low Rated by us, not by the source.
1 Sow and cover
Temperature: 70°F 21°C · Light: light
No stated waiting before sowing. Then 35 days to germinate.
100% germination in 14–35 days.
Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Iris p. 156Public domain Show the original text Iris (Iridaceae). This genus gave -not only great diversity in germination behavior but also some of the most extended multicycle germination observed. Germination is always hypogeal, and true leaves develop in 'a week or two once the radicle emerges even when germination was delayed for years. Empty seed coats and deformed seeds are relatively easy to recognize so that seed counts and percent germination are accurate. A major problem is how to stimulate the germination of Oncocyclus and Regelia Iris since they have such extended natural germinations. Panayoti Kelaidis of the Denver Botanical Garden has iritorrmed me that Fritz Kummert In Austria, Frank Norris in Tennessee (USA), and David Shahak in Israel are growing Oncocyclus Iris from seed in large numbers. Panayoti said that there are reports that germination was much improved by rinsing the seed in dilute Chlorox (aqueous NaOCI) and rubbing off the seed coats after which the seeds germ. readily at 40. There are also reports that gibberelic acid and other chemicals stimulate germination. Data is needed using scientific procedures. A recent book, "The Iris" by B. Mathew, is devoted to this genus. Mathew divides the genus into six subgenera with further division into sections and series. His arrangement is used only in part. The species are arranged in alphabetical order for convenience with subgenus or section indicated in parentheses using the abbreviations B (bearded), Bx (beardless), E (Evansia), 'N (Nepalensis), .0 (Oncocyclus), P (Pardanthopsis), A (Regelia), At (Aeticulata), and X (Xiphium). I. wilsoni germ. 70L(100% in 2-5w) and 70D(none). When the sample in 70D was shifted to 70L after .5 w, 5/6 germ. in 3rd w. Seed Germination Theory and Practice, 2nd ed., Ch. 20, Iris p. 156. Quoted exactly. Every value on this card comes from this record, except the difficulty rating, which is ours; the step names come from a fixed list. How each step is done , in Deno’s words, and what Verified and Derived mean.
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