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.