As a newbie, I am a classic windowsill gardner, much earlier this year I started some lavender seeds on my windowsill. It took a number of casualties, but I now have 10 healthy young 3-4 cm high seedlings (an inch and a half in old money). Today I took them out of the house for the first time, to sit in the sun, still within their old fishtank propogator. To get to this point, took much longer than the 6-8 weeks suggested on the seed packet, I guess I am now at 12 weeks. What are my next steps with my lavenders? I appreciate they may not flower this year, but at what point do I think to plant out? I am in the Netherlands, and we have been without frost for about 4 weeks.