University of Vermont Extension System
Department of Plant and Soil Science

Perennial Plug Propagation Basics COH 41

Dr. Leonard P. Perry, Extension Professor


Plug production tips Plug fertility considerations Sowing

Wk 1 chamber 70-75°, 80-90%RH

(low light or none, plastic cover alternative)

Wk 2-4 prop house 70-75 °, 70-80%RH

air and soil temperature, may need bottom heat

20-10-20 75ppm, 2x/wk 2; 150ppm 2x/wk 3-4

WK 5-6 harden (?) 60-65 °, 35-40%RH

2:1 Ca and K nitrates, and thereafter as needed

288® 50 sample schedule

Fertility in 50s (after transplanting from 288)

Wk 2-4 20-10-20, 150ppm

Wk 5-6 15-10-15, 125ppm

Wk7 on no fertility, or as needed

288 sowings vary with growth rate

Slow, sow late May, 8-10 weeks in 50s; Aquilegia hybrids, Campanula carpatica

Moderate, sow mid June, 6-8 weeks in 50s; Lupine, Geum, Gaillardia, Delphinium, Dianthus

Fast, sow mid July, 4-6 weeks in 50s; Achillea, Leucanthemum, Coreopsis, Rudbeckia

72, 125 sample schedule

Aug sow, 65-75 ° 6 weeks

Sep 15-Oct 15 ¯ temps 6 weeks

Nov 35 ° , hold 12 weeks

Feb plant 6-12 weeks

Apr-May sell total 30-36 weeks

sell/buy at any stage, depending

Nursery/grower scheduling options

Finishing for April Sales (February planting) to 4 inch pot, from Finishing tips
Return to Perry's Perennial Pages

Issued in furtherance of Cooperative Extension work, Acts of May 8 and June 30, 1914, in cooperation with the United States Department of Agriculture. Lawrence Forcier, Director, UVM Extension System, Burlington, Vermont. University of Vermont Extension System and U.S. Department of Agriculture cooperating, offer education and employment to everyone, without regard to race, color, national origin, sex, religion, age, disability, political beliefs, and marital or familial status.

Last reviewed 12/01