The couple, who grow daffodils commercially at their Diamond Gardens near Gemmells Crossing and have 287 varieties, took most of the major prizes at the weekend's North Otago Horticultural Society spring show.
Mrs Lawrence's "two yellow yellow" large cup bloom, a new variety she grew from her own seed, won the champion of champions bloom.
Mr Lawrence's Unique three blooms won the champion of champions vase.
Between them, they also won five other premier bloom awards with their daffodils.
This year the number of entries were down by 150 to 340, affected by a period of heavy rain, warm weather which brought spring flowers out early and then strong northwest winds which knocked the blooms around.
But Mr Lawrence, who is also a judge, revealed his secret to overcoming the vagaries of nature and producing award-winning daffodils.
"It's a secret that should be spread around," he confided at the prize-giving on Saturday.
He picks the daffodil blooms while they are at their best, even weeks before a show.
They have to be picked when the sap in the stalks is high, either at night or early morning.
At night, he goes through the daffodils and selects the best blooms.
The following morning as soon as it is daylight he cuts them.
Then he puts them in a fridge at -2degC.
But part of the secret is the mixture in the containers which hold the blooms - two-thirds water and one-third lemonade (for the sugar).
That keeps the blooms ready for showing up to a month.
If there is no fridge space available, Mr Lawrence said the blooms could be put in the same mixture in a porcelain bath somewhere were there is not excessive light and it is cool - for example under a house - although they would not keep as long.
Mr Lawrence said this was the worst season he had struck for producing champion blooms, but his secret method had helped overcome that.
Society president Connie Rayne said the show was a week later than usual because of demands on judges and that, combined with the weather, affected entries.
