Image for Gumweed


Scientific name

Grindelia squarrosa


Gumweed is a perennial species which is short-lived and can grow up to 1 m tall. Gumweed may also be referred to as Curlycup Gumweed, tarweed, rosinweed or resinweed. Each plant contains 3-20 flowers with 25-40 yellow petals and a yellow center disk. Gumweed is easily distinguished by the bracts around the base of each flower, which are curved and have a sticky resin. Gumweed leaves are arranged alternately on branching stems, oblong in shape, and have toothed margins. Gumweed is highly beneficial to native bee species.

Planting conditions

Gumweed is a drought tolerant species which will grow in dry to moist conditions. It prefers well-drained sand or loam soil types and is tolerant of all soil Ph levels. Gumweed can also tolerate nutritionally poor soils, but requires full sun. It grows naturally on prairies, disturbed sites, fields, and along roadsides.


  • Plant height:
    • Max 1.5m
    • Max 2m
    • Max 3m
    • Any
  • Moisture level:
    • Dry
    • Normal
    • Moist
    • Drought Tolerant
  • Light conditions:
    • Full sun
  • Soil type:
    • Sandy
    • Loamy
    • Rocky
  • pH:
    • Acidic
    • Basic
    • Normal
  • Depth:
    • Wildflower
  • Plant type:
    • Wildflower
  • Height:
    • 1 m
  • Spread:
    • 1 m