Iris Plants
Q.

Since Sept & Oct are hot months in my zone 9 N. CA area, when should I plant irises?

Zone 94558 | Anonymous added on September 5, 2019 | Answered

Bulb companies send out fall bulbs in Sept.and advise you to plant as soon as you get them. Sept & Oct are often in the 90's,occasionally even 100 degrees. though it does cool down below 60 degrees at night. Should I wait for cooler weather before I plant irises?

A.
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GKH_Susan
Certified GKH Gardening Expert
Answered on September 8, 2019

Iris should be planted at least 6 weeks before the first frost to perform well in spring. You could probably plant iris in September or October, even if it's still warm. In cooler zones, iris are planted in late summer.

https://www.gardeningknowhow.com/ornamental/bulbs/iris/iris-plant-care.htm

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