Yucca - how to eradicate

In our front garden Yuccas have been for probably more than 30 years and have taken control. Now we want to get rid of them. I have chopped away the green parts except some, which we still want to see blossom this year. Now I have started to dig out the roots. From just one spot I have unearthed already a whole wheel barrel and if I look at the rest, this will mean altogether a few days of hard work.
Any other way to get rid of them? There are sprouts from the roots and the roots have so much weight that I think there is a lot of energy in them to support further sprouting for quite a while if I leave them in the soil.
Poison? Microbes?
Nomen Nescio
personal e-mail to:nn at utanet dot at
  Click to see the full signature.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
Add image file

Site Timeline

HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.