My lavender gone crazy...

Hi guys, I need some help with my lavender. I purchased it about a month ago, when it was a nice small ball of leaves. Now it looks like this, pic attached.
Do I need to prune it down so it has more growth, or do I need to leave it alone so it flowers nicely?

 

Ps. Loli, it's one of your rosmaries in the background

 

Give the longer stems a slight pruning, it will help the plant to bush out.

 

Looks like its getting ready to flower. Its a bit ahead of its self, too warm perhaps, but it looks healthy enough.

 

That's what I was worried about :( I keep it inside, as it was tiny and it's still so cold, and I like my house baking cosy! If I cut them back, will it still flower this year?

 

Probably, but I wouldn't be too worried either way. Lavender is as tough as old boots. Once the cold weather has passed if you put it outside it will happily live there for years, and if it doesn't flower this year it will flower next and subsequent years.

 

I will probably cut it back then. Thank you for all advice!

 

Yes it will flower this year Peorthine as you are pruning it early enough in the season and it will still put on new growth.

 

I think: Too warm, not enough light.

Put it outside during the day (unless it is Arctic!) . After a couple of weeks "hardening off" when it has acclimatised to being outside (leave it out for a few nights that are forecast to be mild towards the end of the "hardening off" period) then plant it out - if that's you intention, otherwise leave it out if you want it as an outdoor pot.