Transplant time is at about 8 sets of leaves...although a little more or less won't hurt them.
IMPORTANT...introduce your young tender plants to the outdoors slowly and gradually. This process is called 'Hardening off'.
First day for an hour in indirect sun or shade...then add an hour a day and more sun.
The best time to transplant your Habanero pepper plants is at night, or better yet on a cloudy and rainy day. The Sun can be harsh on small seedlings.
Dig a whole several times larger than the root system...maybe the size of a Cantaloupe. Peppers like sand. I recommend digging a healthy small shovel full of sand and another one of well rotted processed Cow Manure into the hole and mix well. If you have soil that is too sandy, add top soil and cow manure.
Tip: Toss a pack or two of matches into the hole fanned out. Your Chili plants will love the sulfur. Sulfur is also a great Fungicide and kills harmful bacteria. This creates a Root Zone that is Habanero plant friendly. It enables the roots to spread out and grow quickly getting nourishment as well.
Also, spray with 2 tbs. of Sulfur mixed with water every two weeks thereafter...this will help keep avoid pepper plant diseases and help keep overall pepper plant problems away.
Water the plant extremely well right after transplanting. It helps prevent transplant shock.
At this point your Habanero plants should be off and running.Fertilize every two week. I like Fish emulsion...but Miracle Gro will do.
On the in between weeks...try my Hot Pepper growing secret...mix 4 tbs. of Epsom salt in a sprayer bottle with water...shake vigorously.
I have some excellent information in my FAQ page to help you out from here. Also, check out my Growing tips page.