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NC State Extension

Delphinium ‘Guardian White’

Trial: Annual

Years Trialed: 2003

Delphinium 'Guardian White'

Good Qualities

Excellent white (2); Productive, healthy plants for 1st year delphinium; Strong stems; Good stem length for everyday bouquets, not too big; Quick from seed, pretty uniform; Tallest of four delphinium trialed.


While delphinium with a white bee is “boring,” my customers prefer ‘Percival’, with a dark bee; On the short side, but planted late and first year; Mildew due to wet conditions; Did not perform in Zone 11; Started too late, no blooms.


Didn’t have a powdery mildew problem as our Belladonna-type whites seem susceptible to – need to see how it does next summer; Our transplants were devoured by Delphinium leaf tier caterpillers in the greenhouse in mid May, it took most of the summer for them to recover, but still we were able to harvest a few stems; Just didn’t do well (Zone 7); Did good for first year.

Trial Data

Delphinium ‘Guardian White’
Yield (stems/plant) Stem Length (inches) Market Appreciation Rating¹ Repeat Again Rating¹ Ease of Cultivation Rating¹ Average Spacing (in2)
Wholesale Retail Consumer
Average 2.1 25.3 3.3 3.8 3.9 3.9 108
Range of Responses 1-5 16-36 3-4 3-5 3-5 3-5 36-192

¹1 to 5 scale, with 5 being the best. Market ratings are based on sales to wholesalers, retailers, or final consumers direct.


PanAmerican Seed
P.O. Box 438
West Chicago, IL 60186

Page Last Updated: 8 years ago
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