Ms Johnson has grown roses for two decades and does not plan to stop any time soon.
“I love my garden,” she said.
“I’d be lost without it. I had 300 roses in pots at my old house, then I planted about half of them here when I moved in two years ago.”
Ms Johnson, who worked at the recently shut down Melville’s Nursery in the Hills for 20 years, will be a judge at this weekend’s Autumn Rose Show in Guildford.
“The Rose Society of WA holds an autumn and spring show every year,” she said.
“The shows have been going nearly 80 years since 1938.
“With this weekend being Mother’s Day, it’s a perfect place to go.”
Along with other rose experts, Ms Johnson will judge more than 300 magnificent rose blooms in a variety of different classes.
Ms Johnson said the shows in Guildford had done very well over the past years.
“Entry is just $5,” she said.
“At the Show you can enjoy a cuppa and cake and there are rose bushes for sale, a plant stall and a gifts stall.”
The Rose Society will also run a raffle, which will be drawn at the end of Sunday.
The prize is a two-night stay at the Quality Resort Sorrento Beach and some rose bushes.
“After the raffle on Sunday, roses are sold off for 20 cents each,” Ms Johnson said.
“A lot of people come down then to get a bunch for their mums; it’s a real bargain.”
The Rose Show will be held at the Guildford Town Hall, on the corner of James and Meadow Streets, from 1pm to 5pm on Saturday and 9am to 4pm Sunday.