Monarch Butterflies Hold a ‘Torch’ for Tithonia
Tithonia rotundifolia ‘torch’, Tithonia speciosa ‘torch’, Tithonia diversifolia: Mexican sunflower
- Annual plant (perennial flower for USDA hardiness zones 10-11)
- Tithonia diversifolia is hardy to zone 9a
- Full sun to part shade
- Height: 4 to 6 feet
- Spacing: 3 to 4 ft
- Flowers: vibrant orange, red or yellow
- Blooms summer to first frost
- Start seeds indoors 1-2 months before final frost
- Sow seeds directly after final frost
- Buying plants is a good option for colder regions
- T. diversifolia can be started with stem cuttings
- Long bloom period
- Dark green leaves make a striking contrast with bright flowers
- Tall plants make it easy to view butterflies
- Easy to start from seed
- No serious pest issues
- Attracts a wide variety of pollinators
- Attracts swarms of migrating monarchs
- Must be regularly deadheaded
- Flower heads often broken by birds
‘Torch’ Growing Tips:
- These need heat to germinate and really take off. If you live in USDA hardiness zone 6 or below, buy plants or start seeds in a spring sowing container 1 month before final frost.
- Deadhead every 2-3 days for a bounty of beautiful blooms.
- Our largest Mexican Sunflower eclipsed 8 feet last year…grown in morning sun and partial afternoon shade.
- Try an all-purpose fertilizer to boost initial plant growth
- Average water needs. Don’t overwater.
- Stake tall plants to avoid toppling over or
- Cut back plants to encourage bushier growth (This puts less pressure on the base of the stalk, and the plants will grow into each other adding further support.
I know several gardeners who have lost magnificent (8′ plus) Mexican sunflower plants to wind events because they didn’t preventatively stake or cut back plants. Considering all the pollinators this attracts, it’s a devastating loss to the butterfly garden 😭
This nectar plant also attracts bumblebees, eastern tiger swallowtails, eight-spotted forester moths, fritillaries, giant swallowtails, honeybees, hummingbirds, painted lady butterflies, pipevine swallowtails, skippers, spicebush swallowtails, sulphurs, queens, and more… (If you know of others, please comment below.)
The ‘Torch’ cultivar has been widely reported by butterfly gardeners to attract lots of butterflies, but some of the lesser planted varieties might bring home the butterflies too.
There are also dwarf varieties if you’re seeking smaller plants. Later this season, I will be reporting my growing experience with the
1. Find Orange or Red ‘Torch’ Mexican Sunflowers– Make sure to buy ‘Torch’ cultivar seeds and not the dwarf varieties.
2. Find Yellow ‘Torch’ Mexican Sunflowers– If you notice in the video above, our yellow T. speciosa ‘torch’ Mexican sunflower (the first plant I walk by) is getting just as much attention as the traditional orange.
3. Tithonia Diversifolia Yellow Flowers– Its botanical name is Tithonia diversifolia and is an alternative yellow Mexican sunflower that grows perennially for zones 9a and up.
Find More Monarch Magnets on our Butterfly Flowers Page
Please post below if you have any questions or comments about growing Mexican sunflowers in your garden: