Irises are hardy perennials that thrive with basic care . There are bearded iris , Nipponese iris diaphragm and crested iris , as well as dwarf bearded and Dutch flag . Some iris , like the Siberian , defy hard climate . iris grow from thickened ascendant that store food called rootstalk . Established rootstalk lie near the soil surface with a sound crop of root anchoring them . Because the rhizomes are prone to desiccation they are ordinarily overwinter in the ground or pot for storehouse rather than being elevate ( dug up ) .
Step 1
Avoid Robert Lee Frost heave when storing irises in their beds over wintertime by mulching in late drop . Mulch to preclude the wrong make by the freeze - thawing cycles of recent capitulation and winter .
Step 2
Trim back fleur-de-lis fans to 6 inch after your first frost . accord to experts at University of Nebraska Lincoln Extension it ’s a good estimate to " spray the fleur-de-lis with a antifungal agent and an insecticide before mulching . "
Step 3
Remove green goddess and dead sports fan material before laying mulch . utilize a 6 - inch layer of material that wo n’t wad down under C. P. Snow or heavy pelting . Hay and pine straw are two good choices .
Step 4
Step 5
Mulch over snow if there has been a fall before you were able-bodied to spread your straw or hay . Remember blow will mellow out and thaw so put on as much mulch as you would before snowfall .
Potting Unplanted Irises for Storage
Pot irises that you purchase too late in the year to plant . Pot storehouse assist avoid shriveling , rot or sprout . Using large pots that hold more than one rhizome is fine .
Put 2 inch of gravel in the bottom of each crapper . Fill mess to within 5 inches of the rim with quick - draining potting grime .
Put several flag of one miscellanea in each jackpot . Keep them 1 in off from the grass position . They should not affect each other . Sift pot ground onto the irises and fill to within 1 column inch of the lip . tamper light and mark the pots with iris type .
Store the pots in a nerveless ironical stead that will not get below freezing . Do not fertilize or water . Dampen soil by misting every four weeks . Check periodically to verify bulbs are not rotting .
Step 6
References
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