How To Grow Marigolds From Seed Outdoors. Leave space between them depending on what type they are. Sow the seed thinly in patches or rows, 1cm deep, and cover lightly.
Marigolds can also be a trap crop for slugs and snails. You’ll need to leave more room between each plant if you are growing larger varieties. Water gently and regularly over the next week to keep the soil from drying out.
Generally, their maximum lifespan is less than a year, even when they’re started early in the year indoors instead of starting from seed directly in the garden.
It is important to place your marigolds outdoors in full sun. Water gently and regularly over the next week to keep the soil from drying out. When you water marigolds, allow the soil to dry somewhat between waterings, then water well and repeat the process. Generally, their maximum lifespan is less than a year, even when they’re started early in the year indoors instead of starting from seed directly in the garden.