Recently I've been growing 4 Bonsais - Picea Mariana, Pinus Aristata, Pinus Thunbergii, and Jacaranda Mimosifolia - and one of the Jacaranda seeds hasn't sprouted. It's been a little over 2 weeks and all the others have already at least 2. I'm wondering what went wrong during the germination process. I'm thinking it might have something to do with the difference in seed shape and thickness. I still have half of the seeds left and am going to try again in less than a month if it shows no progress. If anyone has any advice on Jacarandas or Bonsais in general I would really appreciate it, I need all the help I can get.
Certified GKH Gardening Expert
The art of Bonsai takes lots and lots of practice! Don't be discouraged, as you may kill hundreds of seedling, and trees before you get one that grows like you want.
Learning the basics, and starting with a tree that is very hard to kill is a good idea. Privet is forgiving, and will be easy to form into bonsai since they are already tolerant of cramped roots, overpruning, and very little feeding.
As far as why a seed didn't germinate... There are too many reason, but trying again will be the first thing. If the other seeds are germinating, then it could be that the one particular seed was dead, or inactive.
This collection of articles will help you with producing Bonsai Trees: https://www.gardeningknowhow.com/category/houseplants/bonsai