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Hardiness ratings refer to the UK growing conditions. Minimum temperature ranges (in degrees C) are shown in brackets


H1a - Under glass all year (>15C)

H1b - Can be grown outside in the summer (10 - 15)

H1c - Can be grown outside in the summer (5 - 10)

H2 - Tolerant of low temperatures, but not surviving being frozen (1 to 5)

H3 - Hardy in coastal and relatively mild parts of the UK (-5 to 1) 

H4 - Hardy through most of the UK (-10 to -5)

H5 - Hardy in most places throughout the UK even in severe winters (-15 to -10)

H6 - Hardy in all of UK and northern Europe (-20 to -15)

H7 - Hardy in the severest European continental climates (< -20)

Clay Hill Road•Lamberhurst•Kent•TN3 8LT

07973 129 102

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