Home Native Plant Network Propagation Propagation Protocols Asteraceae (Agoseris)

Asteraceae (Agoseris)

Agoseris (grandiflora)


Sunflower Family



(Nutt.) Greene.



Bigflower Agoseris


Marin County, California

A. grandiflora is found in dry to moist places in many differnt plant communities, from British Columbia south to California and west to Montana and Utah.



Container (plug)

Deepot 16


Height: N/A
Caliper: N/A
Root System: Firm plug in container.

Seeds are collected between June 1st and August 1st. Mature inflorescences are white. Seed is dark brown to black and are mature when they are easily removed from head.

Remove seeds from heads. It is not necessary to remove seeds from pappus.

Not required.

Fully Controlled Greenhouse.
Sowing Method: Transplanting Germinants.
2 grams of seeds are sown per flat containing Sunshine Mix #4 Aggregate Plus (peat moss, perlite, major and minor nutrients, gypsum, and dolomitic lime).
Seeds are mixed with media to sow and are surface sown.
Flats are watered in with an automatic irrigation system.
Seeds are sown on June 1st.
% Germination: 10%

Seeds germinate 14 days after sowing.
Seedlings are transplanted 14 days after germination to individual containers 2"x7" tubes (Deepot 16) containing standard potting mix of peat moss, fir bark, perlite, and sand. Transplant Survival averages 95%.

1 month

After establishment, transplants are top dressed with a small amount (1 gram) of Nutricote fertilizer NPK (13-13-13) 2 months after transplanting.

This species requires removal of tops periodically if kept in the nursery more than 3 months.

A California Flora and Supplement, Munz, P., University of California Press, Berkeley and London, 1973.

Young, Betty. 2001. Propagation protocol for production of Container (plug) Agoseris grandiflora (Nutt.) Greene. plants Deepot 16; San Francisco, California. In: Native Plant Network. URL: http://NativePlantNetwork.org (accessed 2021/09/19). US Department of Agriculture, Forest Service, National Center for Reforestation, Nurseries, and Genetic Resources.
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