Lychnis Chalcedonica

Lychnis Chalcedonica

At a birthday party this weekend my children received some starter kits of seeds, pots, and dirt for Lychnis Chalcedonica, aka Maltese Cross in their goodie bags. I looked at a couple sites for information and they seem fairly simple to take care of, I've just got a few specific questions that maybe you guys can answer for me. 1) What is the germination time? I've got a very impatient 4 year old on my hands and "a long time" isn't a specific enough answer for her. 2) If I transplant these out to my garden are they going to go crazy on me and take over the neighborhood? I'm bordering between zones 6b and 7a. Thanks!
Fresh Flowers

Fresh Flowers

pink!

pink!

Squirrels and stuff

Squirrels and stuff

Preen : should I use it?

Preen : should I use it?

some of my bounty!

some of my bounty!

Before & After

Before & After