Skip to main content

Giant Chickweed

Myosoton aquaticum

Last reviewed: June 2026

Giant Chickweed (Myosoton aquaticum)
Photo: Johann Georg Sturm. Painted by Jacob Sturm; published by Kurt Stüber / Wikimedia Commons (Public domain)

Light

part sun

Water

medium

Size

8"–24" H × 6"–12" W

Bloom

May, Jun, Jul

Native to

PA

Pollinators

bees, beetles

Giant chickweed is a sprawling annual forb that produces small white flowers from May through July. This European native has become naturalized in North America and can spread aggressively in moist conditions.

In an HOA neighborhood

Giant Chickweed takes more care to keep looking intentional in a front yard. Maintenance level: low. Consider it for backyard or mid-zone beds rather than the street edge.

Works well in: backyard only.

  • Has distinctly weedy appearance
  • Non-native species with aggressive spreading habit
  • May be confused with common lawn weeds

Wildlife value

The small white flowers attract bees and beetles during the late spring and summer blooming period.

Common questions

How much sun does Giant Chickweed need?
Giant Chickweed grows best in part sun conditions.
When does Giant Chickweed bloom?
Giant Chickweed blooms in May, June, and July.
Where is Giant Chickweed native?
Giant Chickweed (Myosoton aquaticum) is native to PA, per the USDA PLANTS Database and regional native plant society lists.
What pollinators does Giant Chickweed attract?
Giant Chickweed draws bees and beetles.
Is Giant Chickweed HOA-friendly?
Giant Chickweed takes more care to look intentional in a front yard. Consider it for backyard or mid-zone beds rather than the street edge.

Native range data from the USDA PLANTS Database and regional native plant society lists. Pollinator and host plant associations compiled from GBIF, iNaturalist, and published ecological literature.

Ready to grow Giant Chickweed? Add it to your garden in Pollinator Patch to track it and get season-by-season care guidance.

Not sure where to start? Take the 2-minute yard quiz