Do I need to top my lavender?

[trishrenee]

I just started a hydroponic garden inside. I am growing snapdragon, lavender and zinnias. They are going on week 5 since seed. They are looking really healthy but I am wondering if I need to top them (pinching back). The lavender is kind of looking lanky and too tall...but I have read that u should not touch lavender until it's 1 year old,then prune it back. Are my plants to young right now or should I cut back to promote more growth and bushiness? Thanks for your time