mexican sunflower Archives - Local Gardener

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Asked: May 15, 2024

Best Tithonia Varieties for Your Garden

Best Tithonia Varieties for Your Garden

Tithonias, commonly known as Mexican sunflowers, are cherished for their vibrant blooms and ability to attract pollinators. While Tithonia rotundifolia is the most widely known species, several varieties and cultivars offer different colors, sizes, and bloom times to suit various ...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