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I'm looking for thoughts on my choice of potting mediums (primarily using Al's gritty mix and 5-1-1) for my house plants.

Here is what I have so far:

Currently In Gritty Mix
1 snake plant (sansevieria trifasciata)
1 Echevaria (of some sort)
1 pacheveria glauca

Planned for 5-1-1
4 peace lilies (Spathiphyllum)
1 oyster plant (Tradescantia spathacea - it already has a thread started in this forum)
1 fittonia

Will these be okay in the gritty mix?
2 Anthurium
4 Pothos - 3 Marble Queen and 1 Neon.
1 Philodendron Hybrid (bright green, similar color to the neon pothos).
1 arrowhead vine (pink butterfly Nephthytis)
1 Dark Pittsburgh Ivy
1 Arabian Jasmine
2 pelargonium (one from a cutting off the other plant)

Plants I'm just really not sure about
2 Zygocactus (thanksgiving cactus) - a couple of years old, recently (but pre-this-forum) potted up into a mixture of small aquarium gravel/perlite/AV potting soil. I left the old soil on the roots and just put the other around it. Probably all wrong but the roots looked daunting. Also they seem to be fine with lots of new growth.
1 Zygocactus cutting in all fir bark. I think the pieces are too large.

Things that probably won't change, as it's working out fine so far
1 group of 1-2 inch mother-of-thousands in a small clay pot. Same mixture as the zygocactus - aquarium gravel,perlite,AV potting soil. My husband pulled these up on Saturday from a crack in the sidewalk at someone's house. They're doing fine (of course). -- I wrote much of this information on July 4 and reading this now is funny as these plants have TAKEN OFF. They're about 8 inches tall now, with several babies in the pot. I take them to the trash can every few days and scrape new babies off the leaves. I can't water it in the kitchen sink because it drains out to a field and I don't want any missed babies to fall off, run down the drain and start popping up in my outside world.

8 African Violets - currently in 50/50 AV soil & perlite. I've read mixed reviews on them in the gritty or 5-1-1, so I'm afraid to test it. I have numerous (too many) leaves started, so I'll end up trying a baby or two at some point.

Thank you so much!!!

I have determined what is best for me and my plants after all this time, and I will share.

I found that most of my tropicals planted in the 5.1.1 mix relished in it, while all my succulents are very happy in the gritty one. I will have to transplant more often to avoid compaction over a shorter period than the gritty one, but I don't mind.
I had to determine the balance, and I have finally figured it out in my case.

Mike

I did put the English Ivy into gritty already, oh well.

I won't have a problem repotting everyone in the spring because once the kids get out of school I'm a stay at home mom.

I have some outdoor plants I will try in the gritty - with maybe a bit more of the Floor Dry because of our hot summers.

Thank you!!!

~~

If anyone has any other ideas for any of the plants on my list, I'd love to hear the reasoning behind it.
(especially the Thanksgiving Cacti)

The bark pieces should be 1/8 to 1/4 inch in the Gritty Mix.

The bark in the 5-1-1 can range from dust to 1/2 inch, but no larger!!! Most of the
pieces should be around 1/4 inch.

Josh

What size pieces if I use straight bark for the TC? I have one started in straight fir (orchid) bark and it is putting out new growth (wee tiny red leaves) but I'm afraid that the pieces might be too large.

The pot measures 3.75 inches diameter on the inside.

the long pieces - are they sapwood? Rina

In my 5-1-1 with pine bark, there is a bit of sapwood but there isn't any in my fir bark mixes.

Thanks! :D

I have lots of very fine bark. It is 'dust' to approx. 1/8" (I tried to sift to see, there is really nothing that would not pass 1/4" mesh).
What would you suggest - best way to mix it? I have succulents & other house plants that I would like to use it for.
Thnx.

Rina

How do I clean the roots on Schlumbergera truncata before I repot them? I have two that need to be repotted and another that belongs to a family member (it actually has it's own thread, linked below).

The roots on both mine (and obviously, the uncle's as it's not even in a pot) are very compacted and a solid mass. The idea of cleaning them out is rather overwhelming.

And thank you so much, Josh.

It was interesting. This plant had been potted into that medium about 2-3 months ago (I'd probably had it 2 weeks) when I removed & divided it from the pot I had bought it in.

I'm also really realizing that I seriously need to start keeping records about when I repot my plants because obviously my memory just isn't cutting it.

If you mix perlite into pudding, it doesn't increase aeration, drainage, or the ht of the PWT because the pudding simply surrounds the perlite and by doing so, rods of of any significant value UNTIL the perlite becomes a very significant fraction of the soil. Pudding + 15% perlite yields a medium with virtually all the physical characteristics of pudding, but perlite + 15% pudding is a different story.

In your case, when using the heavy medium, the soggy layer at the bottom of the pot would have been there anyway, but that's because gravity dictates that the water moves down in the pot until the capillary attraction of the soil is exactly as strong as the pull of gravity. The perlite, in smaller volumes, can't change that balance, but it does take up some space that would otherwise be occupied by water, so it reduces the o/a water retention of the soil without significantly increasing aeration or the ht of the PWT.

When using soils that don't support significant volumes of perched water, you get a much more even colonization of the soil by roots. Since the entire medium is well-aerated, you don't get the roots running round and round the inside pot wall looking for (growing only where there is ample) air, though roots will start circling if the planting is left to go badly root bound.

Al

I think the taking notes thing is a good plan. I do it some, but now I can't remember just how much soil I removed on my Easter cactus that I repotted early summer in 5-1-1, so I can't really advise you about this even though it is something that I tried. I guess you have to get more systematic about note taking than I have been. The EC bloomed, then started dropping segments like crazy, but is slowing down on disintegrating now and is growing some. But I don't know truly just what is causing this dropping, if it is my husband leaving the window open on the fifty degree nights, or my difficulty in getting the watering right with these new soils, or if I just damaged it a lot with my treatment. There is what looks like disintegrated peat in the collection saucer, so I bet I didn't get all the peat out. But then I can't remember if I cleaned out the saucer when I repotted or not.

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Tapla - I figured it was the perlite floating towards the top when I watered. I thought it was definitely interesting when I pulled the plant out. I wonder how many more I'll find like that. I wonder what my AVs look like, because it does seem that the moment i water them for the first time, more & more perlite appears at the top.

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*taking notes, of a sort*

Today & this evening I repotted a rooted pelargonium cutting and two rooted salvia cuttings (? no idea the type) into the 5-1-1.

The ivy (Dark Pittsburgh Hedera Helix) that I put into the gritty mix had several small plants in the one pot. Some of the plants are doing terrifically, and three or four are droopy, droopy. I imagine there was some root damage so I cut them back fairly severely. One actually seems to be a little more perky after a few hours. Not a whole lot more perky - but some. I'll keep updating.

I also put some fairly sad looking pansy cuttings into the 5-1-1. I didn't hold much hope out for them before repotting so if they do survive, I'll be pleased. (It's my can I oversummer a pansy indoors experiment - two other cuttings are dead, I'm fairly confident.)

The anthurium, in the 5-1-1 as of yesterday, seems thrilled. I'm not sure if I put it into the pot at a little different angle or if it is perkier than it was - but it seems more upright.

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I mixed a large batch of 5-1-1 up on Sunday but it's outside and I haven't had a chance to microwave it to bring it in for the houseplants. I'm currently working on the smallest plants because I only have a small amount of sterilized 5-1-1 mix inside.

Next I want to do:
**one of my smaller Spathiphyllums but they will require more mix than I have available inside. (plus more mess, as they're in 6" & 8" pots)
**my pink butterfly Nephthytis (arrowhead vine)
**my rhoeo tricolor (oyster plant)

I'll probably get to the nephthytis next as it's the smallest of the three.

I want to do the philodendron hybrid (no idea on any other name) and the pothos but, as I said above, I've read mixed reviews on the pothos in the two mixes and it makes me a little nervous. I did divide one of the plants so I guess I could try one of them.

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Josh, if you read this - please, please (pretty please) offer some advice on cleaning off the roots of the Schlumbergera truncatas. I searched the forums for a couple hours (and still have windows open with searches) trying to find out the best way to clean the "sponge" of roots that my two plants (and my uncle-in-law's plant) have formed.

adding to my post two above:
I have so many windows open from searches because I keep running across threads that have information that I want to read. I think I have 11 windows open waiting to read & learn. Unfortunately, they're often about other plants, or care of plants, or whathaveyou - not cleaning the roots of my TC. Craziness! lol

I did not post any photos...and didn't say anything about removing unknown amount of soil either, you mixed me up with someone else...may I say (please, no offence!!!) that you live up to your handle?...LOL
Start talking to the plants, it may slow you down a bit. Re-reading a message before hitting post button helps too. I can see that you are very busy mom & looks like you are doing 100 things at once.
I hope you understand I am not trying to be mean. It just kind of fits - aharriedmom - and I couldn't resist the remark. All just good fun I hope.

If I overstepped, I accept 100 lashes...and will keep my mouth shut.
Rina

*sigh* Harried, yes. I generally reread but still often find things that slip by me. It seems my eyes are perfectly capable of reading what I meant to say, instead of what my fingers typed out. Edit buttons are my friends. :D

There is also the fact that very often, the very SECOND I hit 'submit message,' I think of another thing to say or question to ask.

I think I'll let this post sit here for a few minutes on preview before I submit it. I haven't even finished my first cup of coffee yet so it's probably full of mistakes or phrases that don't even make sense. :)

Thanks for not getting upset about my post...was really a friendly remark.
I often see what I meant to say not what I read too.
BTW, do you "tweet"? (hope this is the proper expression, I really don't know since I don't do it).

I see you'r up early, if only day had 48 hours...

Rina

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rina - it would take a lot for me to get upset on an internet forum. Because I am generally (ha, if I do say so myself) good-humored and fairly jokingly sarcastic, I read a lot of posts the way that I'd mean it if I wrote it.
I may miss some scoldings this way but it keeps drama to a minimum. lol

No, I've never tweeted and don't have any desire to. It seems sort of pointless to me. I guess I'd feel differently if I had things to say that I thought other people needed to hear. ;)

I tend to get up a few minutes after 5am during the school year. It gives me an hour to drink my coffee before the kids start waking up and fighting over their bathroom. It makes me a better mom!
I'm still trying to adjust from the summer schedule of staying up later and sleeping in until about 6:30, so I've been pretty tired the past two afternoons but I haven't gotten tired enough that I am going to bed much earlier. It'll come, probably sooner rather than later as my body tells me it needs at minimum 7 hours of sleep a night and less than that makes it fussy.

First, Rina, bark dust isn't very useful, other than in the 5-1-1 mix proper.
However, you really want the larger particulate, or else your drainage and durability
is going to suffer. I have used excess bark dust as a peat substitute in mixes for
ferns and citrus (just one Citrus, though).

When using straight bark, I get rid of the fine dust. I screen to get the pieces that fall
between 1/8 and 1/2 inch. This is a good size, I find, that allows for plenty of aeration,
but also allows the bark to "touch" enough that it holds moisture well.

In the case of the old potting mix that needs to be removed - soak the rootball for a while,
maybe 15 - 20 minutes and gently loosen with a chop-stick, so that the water begins to work its way
inward. Then, hose out the material with a good hose sprayer - I set mine to 'jet.'

Josh

I hope to get to at least one of my plants by the weekend but I'm not sure if it's going to work out. It might - but my classes start on Thursday so tomorrow I may not have time to do more than water a few plants that need it.

We'll see!

~

I appreciate this forum tremendously - it's been an amazing wealth of knowledge and people willing to share and help.

Thank you for taking time to answer; I wanted to hear your opinion. I screen this bark thru insect screen, not too much goes thru (will use this "dust" either for seed starting in spring, or if any leftovers, just toss it on the garden bed).
I think it may be too fine to use for orchids - maybe I'll try one in it.
I have 1cu yard of it, LOL.

Rina

So.... home from work and off to do schoolwork! Hopefully I'll have enough free time on/by Saturday to get this done. Too bad - this is the first afternoon it hasn't rained in days.

The snake plant in gritty mix stoically doesn't tell me anything at all but seems happy enough - though it's hard to tell with its poker face. (lol)

The dark Pittsburgh ivy in the gritty is getting sadder and sadder. Any ideas? I thought maybe I damaged roots so I've watered it daily but it's not pleased. What would you need from me to help diagnose the problem? Pictures, I assume but what pictures do you want? The mix and the plant only? The mix with a dime/ruler?

The kids are waking up and I'm off to get ready for my first day at school, so I'll check back later (maybe in between classes, maybe not until I get home).

Thanks!

Al

I worry that maybe I damaged too many roots getting the MG off but I'm not sure how many more leaves I can cut off, as I think I mostly left one per "section".

So maybe it is on the road to recovery.... we'll see! :D

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I haven't done anything with the other house plants, got enough school work done yesterday that I got the yard mowed, my most faded zinnia bed pulled up & a bit of amendment done to the bed in preparation for either fall planting or next spring. I haven't yet decided if I'm going to put my winter annuals in containers or in the ground.

Depending on how much we are affected by tropical storm Isaac and how long I'm housebound, I may be able to get in, around my school work, a couple more repots on some of the house plants.

Al

I noticed what you said in your post on Aug.23 @ 6:21:

I thought maybe I damaged roots so I've watered it daily but it's not pleased.

Just wondering if you overwatering plant without or with damaged roots...Hopefully I am wrong.
Hopefully it's recovering for you now. Rina

We'll see. One of my daughters saw it in the kitchen this morning and said it looked better - so if a 12yo could see a difference, I guess it's getting better.

Thanks both of you!