hollyhock rust Archives - Local Gardener

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Asked: June 4, 2023

Does hollyhock rust spread to other plants

Does hollyhock rust spread to other plants

Ok so maybe planting an Abutilon so near to my hollyhocks was not a good idea! The dreaded hollyhock rust can spread to Abutilons as they are the same family. Treatment is difficult but removing the worst of the infected ...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