plants like sag and vals.... That sends out runners. Where would be the best place to cut the runner and not harm it from spreeding? I have a few that are spreeding like crazy and just unsure where to cut. Any suggestions?
To the best of my knowledge, you can cut the runner anywhere. I tend not to cut it too close to the plant itself for fear of nicking the plant. But, there's nothing special about the runner itself, so trim away.
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You can cut them off right at the plant so you dont have any unsightly runner stumps on the mother plants. Whenever I transplant the babies from runners I trim off both sides and leave about a 1/4" - 3/8" piece of the runner attached to help anchor the new plants in the substrate...they rot off eventually anyways.