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Gardening Know How Questions & Answers - https://questions.gardeningknowhow.comShould iris rhizomes be mulched?
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1 Comment To "Transplanting iris rhizomes"
#1 Comment By MichiganDot On 09/28/2017 @ 6:46 pm
The point of winter mulching is to prevent freeze and thaw cycles which can heave the rhizomes. So if you live in a climate of on and off freezing temperatures, wait until the ground freezes (Dec/Jan depending on location) and then cover with a few inches of mulch. You are trying to prevent a warm day or sunlight from thawing the soil and rhizome. In spring, remove the mulch.