Weedy

adjective

1. Abounding with weeds.

   "a weedy garden"

2. Of, relating to or resembling weeds.
3. Consisting of weeds.
4. Characteristic of a plant that grows rapidly and spreads invasively, and which grows opportunistically in cracks of sidewalks and disturbed areas.

   "a weedy species"

5. (of a person or animal) Small and weak.

   "a weedy lad"