Scientists at North Carolina State University lead inquiry into storage temperatures of peony as thinned blossom using three temperature : -3.1C , 0.7C and 3.5C ( 26.4 , 33.2 and 38.3F ) in one experiment and -0.6C ( 30.9F ) in another . Cut flowers were glean mostly in stage 2 but some in early stages of opening . They were twine in paper and commit in boxes that were lined with a polyvinyl wrap and kept in frigid storage for up to 14 weeks . Their experiment showed that tolerance to insensate temperatures is cultivar dependant and lowering the temperature to 0.7 C 33.2F ) and even -.6C ( 30.9 ) can expand the storage life story without sacrificing ( or increasing ) vase life . As with a circle of other trials , pulsing with a sucrose solution did nothing for peony vase life .

It is interesting to compare these trials with single held in Alaska where vase life can be much longer ( 7 - 10 days ) . I have view a lot of peonies put in for 2 months or more , and the flower timbre just does not equate to flowers held for 4 weeks or less ( 34F , 1.1C ) We also prove that for at least the first two weeks , chill extended the vase lifespan of peonies . The big issue , however , is translating it into the practicalities of commercial storage . Most warehousing facilities in Alaska , for instance , would go through refrigeration job , freeze up , at these very cold-blooded temperature . Retrofitting facility to act upon at these low temperature would be expensive . It most likely would necessitate a readiness dedicated to very low moth-eaten storage , something like a CA storage adroitness that was filled with flowers once , kept at a steady at immobilize temperatures , monitor religiously to verify temps did n’t dunk suddenly , then opened up 14 weeks by and by .

For many years the minimum temperature for peony flush decease has been -1.6C ( 29F ) . This study has not pushed the boundaries beyond those cognise limits .

Jahnke , N. J. M. Dole , Ben A. Bergmann , Guoying Ma and P. Perkins - Veazie . 2020 . extend snub Paeonia lactiflora Pall . storage duration using sub - zero storage temperature . Agronomy . 10(11):1694 .   https://www.mdpi.com/2073-4395/2025-02-14

Abstract : Cut peonies ( Paeonia lactiflora Pall . ) have a comparatively short vase life and special handiness due to seasonal production . Cultivars Festiva Maxima ( FM ) , Monsieur Jules Elie ( MJE ) , and Sarah Bernhardt ( SB ) stored at 0.7 C had a long efflorescence open time at 12 weeks of warehousing compared to those held at 􀀀3.1 or 3.5 C , while the flower bud time was untouched . The flower capable time of FM and MJE was no dissimilar for base stash away at a sub - zero temperature of 􀀀0.6 100 for 16 weeks compared to non - stored stems . Flower quality , gap , and lack of deformity was trim back at 16 weeks of computer memory in comparison to non - stored flowers , but high for stems lay in at 􀀀0.6 deoxycytidine monophosphate compare to 0.7 C. Pre - treating stems before store with pulsation of a commercial hydrator solution or a 200 gL􀀀1 sucrose resolution for 2 hydrogen at 4 C had piddling commercial-grade meaning liken to non - pulsed control stanch . The entire phenolic content , malondialdehyde , and superoxide dismutase were not effective indicators of open time or quality loss . This discipline is the first to shew the successful use of a non - freezing , sub - zero computer storage temperature for peony , and the first to hive away cut peonies for 16 weeks , despite an increase risk of reduce prime quality .

root : alaskapeony.wordpress.com