overgrown
adjective
[ əʊvəˈɡrəʊn ]
• covered with plants that have been allowed to grow wild.
• "the garden was overgrown and deserted"
• grown too large or beyond its normal size.
• "the town is only an overgrown village"
overgrow
verb
• grow or spread over (something) so as to choke or stifle it.
• "the mussels overgrow and smother whatever is underneath"