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[reds]

I planted several mimosa T seeds... 2 sprouted and thrived.

I had them in a mineral based mix. (Mostly oil dri. A cactus mix i made. Its what i had on hand.)
They were on top of my aquarium, so their roots were heated when the light was on. Its a manual switch, so it was pretty irregular. They also had cfl lighting, 23w, from a clamp on lamp.

They quickly outgrew the cup I had them in and at 8", i decided to repot them into a proper soil mix.
I made an  impression, added some of the previous soil mix (and mixed a little) and planted the root balls.
I added a bit of rooting hormone to the original pot, and transplanted (as label directions) and capped the soil with gravel asi do with all my plants.
I also moved them to my window.
I opened my window a couple days to expose them, with the hope of moving the pots outside.

Within 5 days, they were wilted and dry. I still water them, hoping, but its hopeless. They are dry to the touch.

Any advice for future crops?

[happyconcacti]

hmmm, I'm not sure but I would guess "shock".

When making changes to a plant, it's best to not make too many at once. If you need repot a plant, put it back in the same place so it can have the same light and temps, ect.

Not sure though,
Hcc

[Greench]

I don't know anything about mimosa but...
-rooting hormone? isn't this only for unrooted cuttings?
-were the roots damaged during transplant? Did you water right after transplant?
-the pot is not heated anymore, means water evaporation slows down, means you have to water less often or root rot occurs. Take a look at the roots. Are they white? If not, root rot.
-maybe the temperature was too cold outside? It's still pretty cold here.

sorry for your loss.

[Frog Pajamas]

Probably either shock or damaging the roots during transplant.

A member experienced with mimosas said they need extra care in transplanting and do best if you can mess with the root ball as little as possible. Just bring all the soil out of the pot and repot without clearing off old soil, etc. He suggested putting netting in the bottom of the pot if you know they will need transplanted so you can extract the whole rootball easily using the cloth.

Would you like some more seeds?

1 Like happyconcacti likes this.

[DansMaTete]

I got some problems with my M. hostilis too so i hijack this thread (if not ok, feel free to move it  )

Both are 6 months old and everything was perfect, growing well, beautiful green color for leaves and red for the thorny trunk.  So one month ago, i transferred one in a much bigger pot to give it space for roots and now, it's loosing its leaves. I know it's totaly normal as it did it before (it gets rid of the unnecessary) but the thing is, it also stopped growing (the buds(?) slow down and there is less and less new leaves). First, i though, well, moving it harmed it but the one that remains in the original pot does the same thing.

Any advice for what to do is welcome and will be rewarded by my eternal gratitude (don't know if it has any value  )

Pictures if it can help
The one in the original pot :


The one in the new bigger pot :


Tiebreaker :Is  M. Hostilis able to stand poor, salted (i live close to a salted pond) ground ?

[happyconcacti]

Hiya DansMaTete,

I'm not sure about salty soil for M. hostilis.

But one thing, don't worry too much about them losing leaves. They come from a very dry climate and lose their leaves every year to inhibit transpiration. The dry season in their climate can be six to eleven months so it's not uncommon for them to be leafless for a while.

Mine lost all it leaves twice and has grown back.

Maybe something else is at play though? I'm not sure.

Hcc

[SoulGrower]

I too suspect something else is at play.  I've now transplanted quite a few of these guys, repeatedly, with no particular care of roots.  In fact, was doing an experiment with a very gritty medium (basically fine gravel).  I completely rinsed roots of all gravel and then transplanted to entirely different mediums (very sandy and peat based also).  No issues whatsoever.

There has also been some recent evidence (on another forum), that these guys can tolerate frost. 

They are however susceptible, like other mimosas, to a certain type of fungus.  Forgot what it is called.  Did you inspect the leaves for any irregularities?

[DansMaTete]

happyconcacti 

You put some hope in my heart with your words. But i don't see what could trigger that change cause nothing change for the one still in its original pot.
Anyway, i let them be and i will see what's happening. crossed fingers.


SoulGrower 

Nothing special noticed but i'm not a specialist at all.



M. Hostilis seems to be perfect for my island which can be very dry for while  but also very wet some years.
Now they just start sleeping, i love to see that, i didn't know some plants could do that even if i've seen M. Pudica before.

One question poped up in my mind, is M.H like some acacia and needs bacterias symbiosis to get nitrogen or something like that ?

[Greench]

Hi DansMaTete

Do you give them any food? some universal fertilizer might prove helpful.

[DansMaTete]

Yep, i did. Quite diluted and not very often (2 or 3 time irc) as i know it's difficult to go backward one you over do it (learned that in the hard way  )

Today, they look really bad  but as i said, wait&see and hope happyconcacti is right.

[MirlitonVine]

One thing I've noticed about mimosa is that it doesn't like to be moved around, even if you just move the pot it's in. I have one in a very large pot, last fall I drug it to the spot where I was building a greenhouse. It lost a bunch of leaves and stopped growing. But after 2 weeks it started to grow again. Then when it cooled down and the days shortened, it lost most of its leaves, like a normal deciduous tree. Since spring began it looks very healthy again.

[modern]

As SoulGrower suspects I also believe that it may be fungal or bacterial;

As a not when you transplant unlike with cacti you want to water in the plant to the new soil and since its a tree you should actually remove the old soil, IF possible, trim back any dead roots, and water in the plant. If you removed TOO much roots you should also trim the growing points of the tree to 'revert the energy' of the plant from growing to rooting while also preventing excess water loss.

I've trimmed back the roots of my mimosa h. to 1/3 the original amount on more than 1 occupation and at worst the leaves drop however they usually stay intact; I do so to bonsai the tree.

PS. I reread the OP and it seems that these mimosas were still seedlings so it may actually just be too much stress on the plant and perhaps lack of humidity to help to along?