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Apr 28, 2018 11:25 AM CST
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London UK
My mother's compost area has some Ranunculus ficaria (lesser celandine) growing in it. Some individual plants were in the compost bin itself (in compost that is ready to use in the garden), I have carefully dug out these with a very wide and deep girth.

However I have read that the tubers can sit in deep soil for a long time and there is a good chance that I have more deeper down.

But the main surrounds to the compost is becoming worryingly covered. It's surrounding the entire area.
In most situations digging it up is not an option, there is too much and not sure where these start or end.

Do I have to dispose of the entire compost? But then it is growing in the surrounding soil.
Can I apply weedkiller to the compost bin? And then still use the compost?

Before we knew it was in the compost we used this on some beds.

If I were to wait till next February when it comes up again. Can I spray it with chemicals without it damaging the Phlox and Anemone which will show new shoots later in the spring?
Or do I have to remove all plants and clear out the entire bed?

Also, I was hoping to try to make our compost a hot compost. Although it is in heavy shade, I have ordered a thermometer.
Will higher temperatures kill off the tubers? Does anyone know what temp it needs to reach for it to kill these?

I am also stuck as to whether to turn the soil as I know that disturbing the tubers only activates more growth and spread of this annoying plant.
May 2, 2018 7:22 AM CST
Name: Heath
sevierville TN (Zone 7a)
Beekeeper Bee Lover Composter Frugal Gardener Houseplants Region: Tennessee
Vermiculture Million Pollinator Garden Challenge
I wouldn't use any weed killers in or around the compost ben. I think tou are on the right track by makeing it hot but i don't know how hot it would have to be. I would go to lowes or home depo and get a garden torch and burn them. It will take a while. Go out there every other day and burn the new growth and eventually it will die.
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