What are rootrainers? Get your seedlings off to a strong start

Rootrainers are absolute staples in a gardener’s sowing kit: they’re designed to promote healthy root growth and make things a lot easier when it comes to planting indoor-raised seedlings outdoors. What are rootrainers, though?

If you’re hoping to sow seeds successfully indoors and then smoothly move the young plants into the garden, rootrainers are a game-changer. In a nutshell, they’re a type of seed-starting container, and they’re especially useful for plants that grow long taproots, like sweet peas.

Here’s how rootrainers work, their benefits, and which plants are most fond of them.