Convolvulus arvensis
broadleaf weedUSDA zones 3–10Active: spring, summerPerennial vine with an enormous root system that can extend 20+ feet deep. Twines around anything it contacts. One of the most difficult weeds to eradicate.
Arrow-shaped leaves; white to pink funnel-shaped flowers (mini morning glories); twining vine growth; extremely deep roots.
Pull or cut vines repeatedly to exhaust root reserves. Can take 3-5 years of persistence.
When: Remove every 2 weeks throughout growing season
Cover patches with clear plastic for 6-8 weeks in summer. The deep roots make this less effective than for other weeds.
When: Apply during hottest part of summer for 6+ weeks
Systemic herbicide that moves to roots. Requires multiple applications over 2+ years.
When: Apply when vines are actively growing and have reached 12+ inches; repeat every 4-6 weeks
Active ingredient: Triclopyr — e.g. Turflon Ester
Grass safety: always match herbicides to your grass species — products safe on Kentucky bluegrass can kill St. Augustine or centipede. Lawn Guardian checks this automatically against your lawn profile.
Lawn Guardian turns this guidance into a schedule timed to your USDA zone and this week's actual weather — and adapts every time you log what you've done.
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