Gardening questions

[Ninnynanny]

Answers are either friend or foe in the garden.
1. Initially Tom owes a dozen maybe (4)
2. My favourite is a tomato (8)
3. The largest garden pest in Great Britain (3,4)

A town which has a tree in its name.
1. And so he ends this quiz initially (4)

Thank you for any suggestions

[cathfromsaron]

toad

[treetops1]

1. Toad