Lavender and Lilies

Afternoon all Yes its me again Mr Novice lol ...we have a cpl of plants of Lavender in our border and now its gone very stringy so Im asking do you cut it back at all and if so by how much ,,,and also have Lilies in pots outside and whilst I dead headed them after flowering they look decidely near to pegging it lol ....HELP

 

Lavender must only be trimmed on the new growth. Do not cut the old wood.
The lilies will die back and come back again next year.

 

Thanks for prompt reply Lea ....i will get there lol