Plectranthus argentatus
(Silver Spurflower)
Family - Lamiaceae
Category - Tender Perennial
Origin - Australia
Season of Interest - Spring, Summer, Autumn
Hardiness - H1c
Height - up to 1m
Width - up to 1m
Location - The Cool Garden
Description: An Evergreen tender Perennial with a bushy, upright habit. Grey-green leaves are ovate to heart-shaped with scalloped margins and are covered in soft, silver-white wool. Small, tubular 2-lipped flowers are pale ice blue and fade to white. The flowering stems and calyces are purple. The Blooms are held in upright, branched Racemes and are produced from midsummer into early autumn.
Award of Garden Merit (AGM)
Flower:
Small tubular, 2-lipped flowers are pale blue to white. Each bloom has a purple calyx. The flowers are held in upright, branching racemes on purple stems and are produced from July to September.
Flower colour: Blue, white
Flower shape: Tubular, 2-lipped flowers in racemes
Flowering time: July, August, September
Foliage:
Grey-green leaves are ovate to Cordate in shape with pronounced veining. The leaves have Crenate margins and are covered in soft silver-white wool. The leaves are held in opposite pairs up the square stems.
Foliage Senescence: Evergreen
Foliage Shape: Ovate to cordate
Propagation:
Cuttings, seed.
Cultivation:
Best in full sun to partial shade in fertile, moisture retentive soil that is well drained. Plectranthus argentatus will need to be overwintered in a frost free location.