The superlative form of 'stalky', which means having a lot of stalks or being covered in stalks.
This word is not used very often, but it can make people think of plants and gardens.
Examples:
The cornfield is the stalkiest place I've ever seen.
She picked the stalkiest flowers for the bouquet.
The stalkiest part of the garden is over there.
The stalkiest tree in the forest is the tallest.
In the land of giants, the plants are the stalkiest.
The stalkiest plants in the world are in the jungle.