He added that there is a lack of choice in the UK market for indoor plants, with IKEA and DIYs dominating but stocking narrow ranges, while garden centres are generally seeing long-term decline in sales.
According to Drummond, big leafed indoor plants are fashionable this year.
On this year's Efig Indoor Plant of the Year 2015 shortlist are: fig, cheese plant and Medinilla Magnifica.
Efig will announce the winner for the start of the third National Plants at Work Week (13 - 17 July).
Drummond was chairman of judges for the award. HW's Matthew Appleby was a judge.