Small regular purple dots on my marigold seedlings

Dear MGs, could you please help me. I have started some marigold seedlings very early as part of my horticulture course assignment. They are very healthy looking, are growing under their very own grow light, and are even beginning to…

Growing Marigolds from Seed and Cross Pollination

How can I prevent my marigolds from cross pollinating with other marigolds of different varieties?  I want to harvest seeds that will grow and look just like their parents.  My yard is really small, so each of my marigolds (they…

Marigolds as Ant repellent?

Is there any scientific proof that marigolds act as an ant(insect) repellent? I’m asking since ants tend to crawl into the home, since the flower garden is close to the house.  With high maintenance roses, along with other plants, adding…

Bringing marigolds inside for the winter

I was given marigolds at a mother’s day event this year, and they have bloomed in outdoor soil. As an annual, do they just die, and need to be replaced with new seeds? Or do they grow again? Could I…

Drought Tolerant Annuals: A Toronto Master Gardeners Guide

  As annual plants complete their lifecycle in a single season the concept of drought tolerance is a bit moot. Unlike perennials that can become drought tolerant after they are well established, our Southern Ontario short growing season means that…