Actaea Archives - Tropical Gardening magazine

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Asked: July 5, 2023

How to grow Actaea simplex ‘pink spike’

How to grow Actaea simplex ‘pink spike’

Actaea simplex ‘Pink Spike’, commonly known as Pink Spike bugbane or Pink Spike cohosh, is a beautiful perennial plant that produces tall spikes of pink flowers in late summer and early fall. Here are some guidelines to help you grow ...Read more

RHS Hardiness Ratings	USDA Plant Hardiness Zones	Approximate Temperature Range (°C)
H1a H1b H1c	13 12 11	>15°C 10 to 15°C 5 to 10°C
H2	10b	1 to 5°C
H3	9b to 10a	-5 to 1°C
H4	8b to 9a	-10 to -5°C
H5	7b to 8a	-15 to -10°C
H6	6b and 7a	-20 to -15°C
H7	6a	Below -20°C