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Of the more than 50 species of marigolds, only two are usually grown in gardens: African marigolds (Tagetes erecta) and French marigolds (Tagetes patula). Unlike annual marigolds, these perennial varieties can survive light frosts.Click to see full answer. Hereof, how long do African marigolds last?Marigolds are annuals, which means they germinate and die all in one growing season. Generally, their maximum lifespan is less than a year, considering that they are usually started indoors in midwinter and die with the first frost.Subsequently, question is, do African marigolds spread? Blooms may be 1/2 to 4 inches across and produce for some months if deadheaded. African marigold is heat tolerant once established. Marigolds can only be propagated from seed. African marigold is an annual, but you can easily save seed to spread the flowers into the following season. Similarly, you may ask, do African marigolds flower every year? The popular types of marigolds for garden planting are all annuals, sprouting, flowering – and dying in the same year. But they may come back the following year thanks to self-seeding.What do African marigolds repel?To date there is very little scientific evidence that the aroma of the marigold plants actually repel pests, however it is a generally accepted scientific fact that marigolds help to control nematodes and attract beneficial insects that aid in controlling unwanted pests.

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