Or have you tried checking with a local garden club? People might be willing to come dig them out for you (and take them away).

Maybe solarizing where the daylilies are would kill them? I have no clue.

Sounds like you have the aggressive orange ditch lilies. Other varieties don't behave like that. if you want to completely eliminate them, use Round up.

i would use a garden fork.. and double dig the whole bed ... removing every piece i could find.. and may as well work some good compost in while you are at it ...

there is no lazy easy way to do it ..

ken

ps: or move

I got rid of 3 clumps of the ditch lily Hemerocallis fulva,

digging them up with a fork,

pulling lots of rhizomes

like, 2 years ago,

now there are still some stragglers popping up that hid under stone slabs or near them.

definitely use a fork

how larg is the area roughly?

Round up will NOT kill them. No poisons will. Digging and redigging may get rid of a lot of them. Maybe dig out all the dirt into buckets and then sifting it back in??? Or maybe removing all the dirt to a foot or so down and putting in all new dirt? I removed the orange daylillies in my front flower bed to put in the hybrids 20 years ago. And still they come....not many but some, and sometimes right up through another daylily. You are probably looking at a lifetime chore.

Brad, any chance your neighbors have orange daylilies? If so, is it possible they're breeding with yours and maybe have the dominant genes? Or do you deadhead off all the seed pods? (I'm no expert, but we have orange as well as heirloom yellow growing in the same (large) clump, and there are definitely some mixed breeds in the clump ...)

The orange ditch lilies are sterile; they're not interbreeding with anything. Of course this does not apply to other types of orange daylilies.

Blueberry, no I generally provide neighbors with daylilies! And as Lacey said, they don't generally interbreed though a few varieties can.

One other thing about the toughness of the orange fulva, I dug up a ton of them, put them in my burn pit during a raging bonfire.

A month or two later, there they were putting up scapes in the burn pit! How they survived that is beyond me.

I sprayed mine with a weed killer that was supposed to keep everything killed for 3 months. That worked pretty well for me, but mine were in a bed of mostly those daylilies. I dug out plants what I wanted to keep. And still found a couple aylilies blooming 2 years later, guess it took them that long to recover. I dug those out, but still fine one occasionally. I dig out as soon as I spot them. Some plants like ditch lilies, iris, and walking onions seem to survive the burn pile!

There won't be any seed pods on Fulva Europa aka orange ditchlily . There is the very rare case of a cross of Fulva with something else that can produce a pod but it is not common. The plant is stoloniferous i.e. spreads via root/rhizome which is why it is so hard to eliminate . The plant can regenerate just from a tiny piece of root left behind .

We had 2 whole beds of the common orange kind when we moved in. I dug them all out with a garden fork with great labour and time. The last 3 years I’ve kept digging up the little shoots that appeared so persistently with a hand trowel. This year, Ive only seen one, so I think they’re finally all dead.