This means:
“If you see a particular plant growing in your garden, don’t pull it out because it may have some useful or beneficial qualities.”
Breakdown
“Never uproot” = don’t pull the plant out of the ground or remove its roots.
“This plant” = the headline doesn’t identify the plant, creating curiosity.
“If it appears in your garden” = if the plant grows there naturally or unexpectedly.
The headline implies there is a good reason to keep it, such as benefits for the soil, pollinators, wildlife, or possible traditional uses.
Tone
This is a gardening clickbait headline. It deliberately hides the plant’s identity and the reason you shouldn’t remove it, encouraging you to click or read further.
A simpler version:
“If this plant grows naturally in your garden, here’s why you might want to keep it.”
