Polyethylene glycol seedling priming


PEG can be purchased for trailer/home water pipe antifreeze purposes.

Please note, PEG is different than normal car antifreeze.

Link: www.actahort.org/books/782/782_32.htm

Interesting. But beware that the same compound inhibits seed germination. See


Inhibition of Amaranthus caudatus seed germination by polyethylene glycol-6000 and abscisic acid and its reversal by ethephon or 1-aminocyclopropane-1-carboxylic acid

When I read this paper years ago I changed my imbibing and stratification practices. It happens that a similar polyethylene glycol moiety is part of the molecule sold as a common laboratory wetting agent, Tween-80. Likewise, similar compounds are used in making paper towels, as a re-wetting agent (that’s right, there’s soap on Bounty paper towels). And if that’s not enough, the common dishwashing detergents like Dawn are also mostly PEG molecules. So I wash my paper towels, five rinses in hot water, before using them in stratification and do not use any detergent to help wet the seed when soaking them.

Link: www.blackwell-synergy.com/doi/abs/10.1111/j.1399-3054.1986.tb05060.x