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This sunflower-like annual (Tithonia Rotundifolia) has radiant scarlet-orange flowers that attract a lot of attention! It is favored by hummingbirds, bumblebees, and butterflies - especially monarchs! Individual single daisy-like flower can grow as wide as 3.5" on bushy plants 5'-7' in height. Start sunflower seeds indoors for early blooms.
Start indoors under lights 5 to 6 weeks before transplanting out after all danger of frost has passed. Select a sunny location with rich soil. Prefers drier conditions when mature.
Mexican Sunflower Seeds Growing Details | |
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Botanical Name | Tithonia Rotundifolia |
Plant Spacing | 20-24” |
Planting Depth | 1/4” |
Spread | 2-3’ |
Height | 4-6’’ |
Germination Temp | 70 °F |
Light Required | Full Sun |
Life Cycle | Annual |
Days to Germination | 10-14 Days |
Days to Maturity | 80-90 Days |
Planting Zone | 8-11 |
Flower Form | Daisy-like |
Yield | High |
Growth Rate | Fast |
Growing Season | Spring - Fall |
Blooming Season | Summer - Fall |
Mexican sunflowers can be great for growing outdoors in pots. When planting in pots, choose a large breathable container. Since these plants do not grow well with excess moisture, select a pot with large drain holes.
Yes, if they are allowed to produce seed and have good growing conditions, Mexican sunflowers may self seed.
Yes, Mexican sunflower seeds are edible, but not as tasty as other sunflower seeds.
Though related to them, Mexican sunflowers are not true sunflowers, and their seeds do not look or taste like traditional sunflower seeds. These bitter seeds can still be eaten, but they are better suited for planting.
As the seeds get ready to be harvested, the seed heads turn brown and begin to droop. The seed can be prickly, so you may need to wear gloves while handling them. Remove the seeds and spread them out to finish drying. Once they are fully dry, then store in a cool, dark location to plant again another season.