Grindelia – Grindelia robusta

Current Demand = GOOD
Demand: Poor – Normal – Good

Parts Used: Herb
Current Market Price = $ varies/lb.

Grindelia – Grindelia robusta Grindelia – Grindelia robusta Grindelia – Grindelia robusta

Family: Asteraceae

Some Common Names: *gumweed, hardy grindelia, gum plant, california gum plant, scaly grindelia, tar weed, rosin weed…

Description: Gumweed is a genus of plant that belongs to the sunflower family and is native to the Americas.


Part used: herb

After harvest, remove all foreign matter (rocks, weeds and vines) and spread in a thin layer immediately. Dry your herbs and leaves in the shade to keep their green color. By spreading out your botanicals in a thin layer allowing air flow will help prevent mold. Once dry do no allow your botanicals to get wet again.

Grindelia can be dried outdoors though it needs to be dried out of the sun. At night cover the Grindelia to keep the dew from setting on the drying herb. When possible dry indoors in a well ventilated barn loft or attic to protect against the elements. If natural heat is not available you may need to add heat and a fan for continuous airflow. Whether you dry indoors or outdoors you will need to turn the herb daily. The key to drying any root, herb or bark in an even combination of heat and airflow. Never use an oven or microwave.

Cultivating: Seeds or cuttings. Take cuttings before the plant has flowered. Seeds will germinate without stratification, but will germinate better with stratification. Germination time is typically 2-3 weeks. Older plants (usually form a clump) can be divided and replanted in the spring. Recommend planting on 18 to 24 inch centers, with row spacing of 24 to 30 inches.

Attributes (Images)

Photo prise au jardin botanique de Meise (Belgique) ©Jean Tosti

By Jerzy Opioła (Own work) [GFDL or CC BY-SA 4.0-3.0-2.5-2.0-1.0], via Wikimedia Commons

By User:BotBln [GFDL or CC-BY-SA-3.0], via Wikimedia Commons