Need mulch to be this?

[TC1]

The letters I have are as follows: -T-R--E.
Your help would be much appreciated, many thanks in advance.

[aniani]

sterile

[weeal]

Post it in Quizzes and Puzzles you might get the answer quicker

[weeal]

oops well done aniani lol

[aniani]

quite right though, weeal x

[TC1]

Many thanks and yes I did realise I had put it in the wrong category, thanks for that!

[weeal]

ooh I wasnt being the category police tho, was tryin to help lol