depending on the variety, will help the plant grow quickly.

AGM cultivars

The following is a selection of cultivars which have received the Royal Horticultural Society's Award of Garden Merit:
* = 'Conblue'
* = 'Conglow'
* = 'Constraw'
* = 'Kleph15313'
*'Storm Lavender'
*'Storm Pink'
*'Storm Salmon'
* = 'Suntosol'
* = 'Sunpurple'
* = 'Kerpril'

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