It's definitely getting close...
I'd repot when roots start appearing at the bottom drainage holes.
For the least trauma, slip the entire root-ball out, set it in the new pot,
and gently fill around the sides of the root-ball with fresh medium.

Nice seedling!

Josh

Thanks, Greenman.
Hmmmm, I was hoping I could go a couple more weeks. I will check for roots at the drain holes on the bottom however. I guess it doesn't matter since I will have to repot this one and all the rest prior to getting them outside for good. We dont start our growing season until mid May up here in Wisconsin.

You can probably squeeze a couple more weeks out of it.

I don't plant in-ground until May...and I'm actually considering planting closer to June,
due to the rains and the cool Spring weather.

Josh

Wow this looks great! We started our plants around the same time but yours appear to have taken off quite well. My largest plant has 4 sets of true leaves and they aren't a rich green like yours. Whats your secret? I keep them in the sunlight as long as possible and light them closely with a standard cool white bulb (Not as effective as grow lights but way cheaper). Also, have you used any seedling fertilizer? Keep up the great work, hopefully your plants continue to thrive!

Wow this looks great! We started our plants around the same time but yours appear to have taken off quite well. My largest plant has 4 sets of true leaves and they aren't a rich green like yours. Whats your secret? I keep them in the sunlight as long as possible and light them closely with a standard cool white bulb (Not as effective as grow lights but way cheaper). Also, have you used any seedling fertilizer? Keep up the great work, hopefully your plants continue to thrive!

JamesonF:
Check my blog. It chronicles my pepper growing efforts pretty well. I will be updating it tonight or tomorrow.
I used a guide I found on the internet for growing my peppers. I am new to growing them from seed so I figured I could use the help. The web address of the guide is: http://www.ecoseeds.com/Pepper.growing.tips.html

My blog web address is: http://pepperpikker.tumblr.com/

Here is a link that might be useful: Growing Hot Peppers in Wisconsin Zone 4

Nice stuff, Esox (or should I call you pike man?)
I'm in zone 5 (central CT) and we don't get soil and air temps warm enough to set out peppers until about Memorial day. Some folks set them out "after danger of frost", but I can tell you that peppers and tomatoes do not like cold (or wet) feet, and will have problems if nighttime temps drop below 50 for more than 1-2 nights in a row. My point is that you've got at least 8 weeks before you should set them out, so you'd better pot them up. I start my seeds on April 1 (March 15 for the slow germinating varieties like Bhut Jolokia), and pot them up into 4 inch rounds. By Memorial Day, they are just beginning to show roots at the bottom of the pot. Your plants look like mine do about 2-3 weeks before planting in the ground. You might end up needing a 5 or 6 inch pot by the time you're ready to set out IMO.

Preston. Nice to see an east coast guy know what "Esox" is. ha.
Yah, I probably wont get them out permanently until later may. I had a Habenaro starter and some Cayenne seedlings in on May 18 last year and they went on to produce nicely. I think I remember having to cover them a couple nights though. Also, I am planning on growing most of my Peppers in Containers this year so that I would be able to move them in at night if necessary.

Sounds good, Esox. One thing that helps a lot with the early end of the season is to warm the soil with plastic mulch. The stuff called solar mulch film works real well for that purpose.

Preston:
I think I have heard of that stuff. So, are you advising to put that stuff on in the spring or fall? Do you just layer it on top of the soil around the plant?