New to bonsai and have several “Pre-bonsai” from various online sources (Brussels bonsai, Evergreen Nursery, etc.) that I recently purchased. Could these be repotted into larger pots using inorganic mix instead of the mostly organic soil they are currently in?
Depends on the species, the time of year, and the stage of development. It could also depend on how much money you want to spend on expensive soil components.
I suggest posting each tree here. Tell us your current and long term goals.
I will take some photos of the trees tonight and post them.
Here are photos of my trees. My goal is to grow the smaller ones out a little before styling and style the larger ones next spring. Probably make the small ones ‘shohin’
Why do you want to put them in larger pots? Is the goal to have them in bonsai container eventually? All I have learned says to put them into small container to reduce internode and to scale roots and foliage. Am I missing something?
Unless the pots they’re currently in are too small?
@Bonsai_bob, different stages of a bonsai’s development require different potting (or planting) strategies. Over-potting a tree is best for enlarging the trunk. I’m having trouble thinking of any other reason to over-pot a tree, come to think of it. Maybe someone else can chime in.
I’m using over-potting as opposed to up-potting. If you’re simply up-potting, then that’s done because a tree has reached a point where smaller pots no longer work.
RECOVERY! Whew! I knew there was another reason to over-pot a tree. Some like to show their trees in undersized pots at a show. Makes the tree look “beefier”. So, a year ahead of a show, the tree is repotted, but instead of trimming the roots to encourage more root ramification, you’re trimming the roots to get the tree into a smaller pot. After the show, you put the tree back into it’s training container. It’s not the same as being over-potted, but it’s a stage where you go from a smaller size to a larger sized pot.
Yes, my goal is to grow larger trunks on the smaller ones.
Mostly to grow them out and to get them in inorganic soil instead of the organic soil they are in now. May wait till spring to repot in to inorganic. I know fall repotting is risky.
That curly hinoki is cool. Where’d you get it?
I think I got that From Brussel’s Bonsai
I over-pot also, using a tile, usually an ups-a-daisy (sealing the 2 big holes), or stone. The roots grow laterally along the ups-a-daisy then down the pot or fabric pot.
I experimented on Miracle grow potting soil and pumice 50/50 up to half the height of the pot then miracle grow potting soil-lava rock-eco complete aquarium substrate 1:1:1 ratio on top of the ups-a-daisy and around the root mass. Here’s my 1.5 yr old trident. It was about the same diameter as a sharpie.
I did the same to my sumac now 2.5 inches in diameter from 3/4 of an inch for 2 years. Just miracle grow soil only.
This year, I potted a crab apple and southern beech and added granular humic acid, rock phosphate and kelp meal to the potting soil. Let’s see how it goes. Still on an ups-a-daisy.
@ThienXiang that’s pretty cool. About how high in the pot do you put the barrier? 50% of the way? I’m going to do the same, but I was just going to use a cheapo plate from Walmart. I imagine that there’s room for the roots to grow around the ups-a-daisy and down to the bottom half of the pot?
What is an ups-a-daisy? Familiar with placing a tile beneath the terr to make the roots spread, just never heard of an ups-a-daisy.
It’s a name brand planter insert.
You can “float” the ups-a-daisy in the pot to allow roots to escape below, much like a tile, instead of how it’s intended (which is to effectively to make the pot shallower but keeping the same pot size).
I didn’t use a barrier. That was a deep ceramic pot. I drilled extra holes for drainage. I used hydroponic clay pebbles for drainage, single layer.
You can also use the clay saucers, or the paint bucket lids. Just drill holes around the periphery/rim for drainage and wire tie downs or screw.
The ups-a-daisy often goes on clearance with additional discount at fred meyer here in Washington. So I buy a bunch. Ends up like $2-3 a piece. Sturdier plastic than bucket lids that i used to use.
Apologies. The ups-a-daisy barrier is about halfway to the rim for shallower and wider pots, 1/3 to the rim for deeper pots like the usual nursery black pots or fabric pots.
By the way, I use an ups-a-daisy that’s smaller than the pot. So the roots can grow out and down instead of a snug fit.