@Vasyl - welcome to BNut, I am pretty sure I live less than 10 miles from you. I'm northeast east of you in Zion, IL. You are in the happy position of being pretty much the same traveling distance to either the Chicago Botanic Garden, (Glencoe, IL) and the Midwest Bonsai Society that meets there the second Monday of every month, or the Milwaukee Bonsai Society, which meets the second Tuesday of the month at the Boerner Botanic Garden, in southwest corner of Milwaukee County (Hales Corner, WI). You should check both groups out, the Milwaukee group is a flannel shirt and bluejeans crowd. The Chicago group has changed a lot since I was a member, but members would show up in business casual attire more often than bluejeans and flannel shirts. Milwaukee there is no fee to park, and you don't have to have a Boerner membership. For Chicago, parking fee is north of $20 or you have to join the CBG for $75, in addition to club fees. Think Cheddar vs Brie. The Milwaukee group is very active, offers different level classes from beginner, to advanced, and we contract with a visiting artist to do 3 year, 3 times a year advanced classes. Peter Tea is our current visiting artist, in his 4th year of a 6 year arrangement. Both clubs will let you attend several meetings before hitting you up to join. Check them both out.
Milwaukee Bonsai Soc.
Feb 25 - Novice class session #1
March 7 - Tom Longfellow, - taking trees out of winter storage, tricks, tips and problems.
March 11 - Novice Class #2
March 18 - Intermediate class #1 (one opening left)
April 4 - Ted Matson coming in from California - Jin, Shari and Carving workshop - several open slots
May 2 - Brian Huddleson - UW-Madison (Dr Death) - plant disease specialist.
June 2 to 6 - Peter Tea classes (sold out)
July 22 - swap meet
October 13-15 is Milwaukee's Annual Exhibit, Matt Reel will be the guest artist, 2 bring your own workshops, one material provided workshop and the exhibit critique by Matt Reel, All open, sign up has not opened up yet.
and the list goes on.
http://www.milwaukeebonsai.org/
the Chicago group - [url}
https://midwestbonsaisociety.wordpress.com/[/url] - note they haven't posted a 2017 schedule yet, but it may be on their facebook page.
Raintrees,
I am not sure of the identity of your tree from the photo, but I don't think it is a Brazilian rain tree. The Cassia, or Golden Rain tree seems a good match, but there are a couple other species it could be. Regardless, the horticulture would be similar, and when it flowers, that will verify its identity. I have only grown Robinia and Leucaena, so I have no experience with Cassia, though I suspect most aspects are similar. I would consider putting it outdoors in full sun for the summer in order to maximize your rate of growth. Right now you don't have ''enough tree'' there to do any styling with. It looks like you have a single trunk for each, with compound leaves, no branches. In May, after all danger of frost has passed, I move them into larger pots, so they don't dry out too quick on you, and then put them outside. Bring them back in sometime in September, before first frost.
Think about what size tree you would like to have, how tall, and how thick a trunk. What will fit in your indoor growing set up. You will need these seedlings to get larger than that, then we cut them down to bonsai size. Let us know what you'd like, we'll tell you how to get there.
That you started these from seed 2 years ago, speaks well of your good consistent care. That is what bonsai need. You have a good start. Do you have other bonsai? Or are these your first?