Master Gardeners: When to Divide Daylilies and Irises

Daylilies and irises do well when divided every few years.

By Barbara Stalion

Late summer up to 6-8 weeks before the first frost is the best time for dividing daylilies and irises in Garland County. Though it is not necessary to divide them annually, every few years is good. 

Look for signs of crowding. When too crowded they will not bloom as much. The old- fashioned ditch daylilies might need dividing every two years, because they are so vigorous. 

When irises are ready, they will literally look like they are popping out of the ground. If for some reason they cannot be divided in the fall of the year, they can be divided and transplanted in early spring. If this happens in the spring, it does need to occur early enough that the plants can adjust to conditions before warmer weather hits. Many of the Garland County Master Gardeners are also members of the Hot Springs Daylily Society and the Iris Society. The members have a wealth of knowledge about these beautiful and hardy perennials. 

Garland County Master Gardener, Barbara Stalion, volunteers with Garland County Master Gardeners of the UofA Div. of Agriculture, Cooperative Ext. Service. Master Gardeners pool skills and resources to improve home horticulture, stimulate interest in plants and gardening, and encourage beautification.

For more information, call 501-623-6841 or email adykes@uaex.edu. The University of Arkansas System Division of Agriculture is an equal opportunity/equal access/affirmative action institution.

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