On Wednesday morning (May 28th) the minimum temperature as reported by Metservice was about 1 degree Celsius (http://tvnz.co.nz/national-news/coldest-may-morning-in-auckland-almost-40-years-5983750). The coldest it’s been in May for about 40 years. Our lawn was transformed into a green, white and glittering patchwork. The ice crystals have formed mainly on hairs on the plants leaves. This protects the plant from frost damage.