Dividing short lived Perennials, daylilies didn't come back.
I was wondering if you divide short-lived perennials, will this make them live longer? I have Coreopsis 'Moonbeam,' and heard that they are short-lived perennials. Also I planted a bunch of daylilies last year, most have come up this year, all except four. I don't understand why? They all bloomed last year, and had nice size roots. Could they possibly not have come up yet? How long do I wait to see if they haven't made it yet?
Submitted by BHGPhotoContest

Both plants should be long-lived with proper division. Coreopsis should be divided every few years to retain their vigor. Daylilies need to be divided every 3-5 years or they will stop blooming. If a few haven't come back, perhaps they are planted to heavy soil or clay soil. Daylilies prefer well-drained conditions.

Answered by BHGgardenEditors