Japanese Black Pines Bonsai development

I`d like to share the JBP cultivating process that I consider is succesfull so far, in my city in Brazil;
In 2005, in my field I started with some samples initially purchased, then I bought 100 seeds which I got about 30 new shoots.

https://i.servimg.com/u/f44/16/84/25/60/p1000810.jpg

After one year I put then all on the ground, where most of them. lay till today.
https://i.servimg.com/u/f44/16/84/25/60/pino_n10.jpg
https://i.servimg.com/u/f44/16/84/25/60/bonsai20.jpg

In 2009 I started to collect some of then, which I considered were ready for the initial styling.
Some pines in just five years have thicken up till more than 12 centimeters on its base, and some have reached 3 meters high (plants used for reproduction);
https://i.servimg.com/u/f44/16/84/25/60/p1000811.jpg
https://i.servimg.com/u/f44/16/84/25/60/p1000812.jpg
https://i.servimg.com/u/f44/16/84/25/60/p1000813.jpg
https://i.servimg.com/u/f44/16/84/25/60/p1000814.jpg

View of the first growing line
https://i.servimg.com/u/f44/16/84/25/60/p1000815.jpg
This year´s Cone (nut) - so next year new black pines to put on the ground
https://i.servimg.com/u/f44/16/84/25/60/p1000816.jpg

I hope you enjoyed

Very nice planting development... I can't wait to see those in bonsai form.

regards,
jun

I have to say that is amazing.

Some of my pines don't have those thick trunks and are 30+ years old

This inspires me to look into starting seedlings for eventual bonsai use!

Very impressive indeed.
Here, in Britanny JBP don't grow that fast, in fact they are much slower than JRP or scots.

This is amazing, really inspiring me.

I am amazed to see the low lying shoots on those thick pines. They can make some stunner shohin/chuhin bonsai.

- S

Thanks all of you kindy replies.
The development is going fast, though we have the winter time when the plants go to dormancy period.
The trident maples and chinese elms are developing as well as the pines.
Bellow more three pictures from plants collected this year.
https://i.servimg.com/u/f44/16/84/25/60/p1000910.jpg
https://i.servimg.com/u/f44/16/84/25/60/p1000911.jpg
https://i.servimg.com/u/f44/16/84/25/60/p1000912.jpg

nice fast growth in the ground - have you cut around the trees and lifted the trees every 1 or 2 years to keep the rootball compact ? or have you just let them grow freely ?

also when they were seedlings did you remove the main root to encourage a flat radial root system to develop ? i have my seeds in the fridge at the moment and am curious if you have worked on the roots and still got good growth, or if you have let a large root system develop to get the fast growth.

thanks Marcus

Markus your question is very interesting..
These JBP are growing freely, but I cut just the top roots close to the surface in order to develop new and thinner roots to prepair the for its future removal.
About 4 to six month before collecting I dig around to develop more roots and put the tree on big plastic pots.

Regarding the seedlings, I just cut the main root only if it is too big, then I just put it flat on the ground, and let the time do the rest.

As I have been succesfull on ground planting, I don´t use the razor (as we see in books) to cut the small buds after the seedlings.
On ground we have a good development of branchs close to the trunk, I just prune it every year.