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Soil mix in South Florida

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Old 25-Jul-2006   #1
barbet
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Soil mix in South Florida

Hi, I am new to bonsai and very confused about soil mix. I have read about so many mixes that I don't know what to use.
I potted all my bonsai with miracle-grow with an addition of some peat moss for water retention. I did it about 3 months ago when the weather was very dry and it was fine. Now that we have rain every day all the bonsai are soaked and the soil gets compact. I haven't watered in more than 3 weeks!
I am afraid that they will rot. I have 2 questions:
1) What can I do to amend the soil now?
2) What type of soil mix is good for our climate in South Florida, zone 10?
All my bonsai are tropical: bougainvilleas, murrayas, crepe myrtles,ficus,Texas Ebony, Black Olive, Mahogany and Pongam tree.
Any advice will be greatly appreciated.
Irma
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Old 26-Jul-2006   #2
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I lived in Pompano Beach and had the same trees and a few more that you do.

I mixed a soil of calcined clay (turface) aged pine bark (soil amender is the same thing) and it was great. If you want to buy a bag of this, go to the Sears in the Pompano Square Mall on Federal Highway and Copans road.

The garden store at the back is called The Garden Gate, they sell it there. I worked there for 4 years and did the bonsai for them as well as my mixture of soil. I think they still sell it.

I still mix, sell and use this soil here in Michigan.
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Last edited by Repotter : 26-Jul-2006 at 10:29 AM.
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Old 26-Jul-2006   #3
paul11390
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Soil Mix in South Florida

Hi

I live in St. Petersburg, and before joining a club and converting to the club mix, I used a mix of 2/3 Schultz soil conditioner and 1/3 Schultz Cactus and Succulent soil. This will work fine for you and the components are easy to get. I recommended it to a lady down in your area and she reports that it works fine for her. As a side, the conditioner is also sold as water garden soil by Schultz and is the same as Turface.

Best

Paul
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Old 26-Jul-2006   #4
barbet
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Repotter, what is the ratio of the turface & pine bark?
Paul: I am going to try your mix on a couple of my plants. What is your club mix?
I thank both for the advice, there are so many opinions about soil mix that is very confusing. Irma
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Old 26-Jul-2006   #5
paul11390
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Soil mix for South Florida

Paul: I am going to try your mix on a couple of my plants. What is your club mix?


I have never been in on that mixing so I don't know. But it has two kinds of gravel and bark and probibly more. To tell the truth it isn't any better than the mix I used before, lower cost and no labor is its big attraction.

Best
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Old 27-Jul-2006   #6
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Quote:
Originally Posted by barbet
I thank both for the advice, there are so many opinions about soil mix that is very confusing.
Yes it is but try and keep it simple. What you need is something that drains well but at the same time retains 'some' moisture. Both Paul and Repotter have had good success with their mixes and both have a good bit of experience under their belts so you are wise to try their recommendations. Calcined clay (Turface) and lava rock are very good for drainage and the pine bark is good for water retention. I'm in Fl. as well and use all three of the above. For tropicals and deciduous I use 50% bark and for conifers I usually cut it back to about 30%. I would suggest if you are just starting out and have only a few trees try Pauls Shultz product sugggestion as it is probably easy to find. Good luck!
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Old 27-Jul-2006   #7
barbet
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Sauce, right now I have 28 in bonsai pots (still being trained) and about 14 from seedlings to a year old plants; all have the same mix of miracle-gro with peat added. They are retaining too much water with all the rain that we have. Would it be a bad idea to mix some turface to the soil to amend it a bit? Until I repot them again and change the mix. Irma
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Old 27-Jul-2006   #8
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soil ratio

I use 10 parts aged pine bark, 4 parts turface, and for trees like Black Olive and Buttonwood |I add some composted cow manure or dark peat to retain more water.

It drains well and has never failed me.

Quote:
Originally Posted by barbet
Repotter, what is the ratio of the turface & pine bark?
Paul: I am going to try your mix on a couple of my plants. What is your club mix?
I thank both for the advice, there are so many opinions about soil mix that is very confusing. Irma
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Guest master Pedro Morales visit was a huge success.
Tellys Greenhouse, 3301 John R road, Troy Mi. 48083

Four Seasons Bonsai Club meetings monthly.
Troy, Michigan

"Anything is possible when you don't know what you are doing"................someone famous I think.
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Old 28-Jul-2006   #9
Graydon
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I would repot soon!

Irma - I do not think you can 'amend' the soil you have. The turface everyone has recommended needs to be thoroughly mixed with the other parts of the soil not just placed on top or mixed in the top half of the pot. Root rot starts at the bottom of the pot where the water can't drain out because of the dense soil mix you have.

I am in central Florida and I feel your pain - it rains every day it seems. You want FAST draining soil. Do not worry about water retention as this is the enemy of your plants roots! Root rot can set in fast and before you know you have a great collection of deadsai. You want the water to flow thru almost as fast as you pour it on. It's this exchange of "air" that is introduced to the roots that is needed for the health of your plants.

I am familiar with most of your plants listed and as long as you can check often and water when needed any mix suggested will work. Just because they are tropical it does not mean they like wet feet. Just don't let them dry out all the way.

Skip the peat as you do not need to retain moisture. Skip the miracle grow soil. To me turface is a little expensive unless you purchase it by the 50 lb. bag if you can find it. And it is heavy! I recommend a mix of 50/50 pine bark (source: Lowes - they have a 40 quart tree and shrub planting mix for $7 that is almost strait bark called Jungle Growth) and pearlite (source: Lowes - they have an 8 quart bag for $3). With that mix you can make 80 quarts of soil for $22 plus tax.

In the mean while read up on good bonsai soil mixes - how they work and why you use what ingredient. A great place to start is Brent's blog. Scroll down to Science and Soils posting.

Good luck!
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Old 28-Jul-2006   #10
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You may also want to go check out your local bonsai club-broward county has a good one (some of the members are even members of mine down in Ft. Pierce). If you can get to Vero, Jim Smith's nursery sells turface very reasonably-$15 for a 40 lb bag (will last a while!).

I'm down in St. Lucie county, and use a mix of either turface and soil, turface and jungle growth, that aquatic stuff (basically turface) and cactus soil, or yard soil and cactus soil. My few plants in a peat based mix have all croaked due to too much water.... haven't lost one yet to too little water!

As for your plants, the ficus won't care if you repot now.... but some of the others might. Could you possible set up an overhang to keep the rain off and let them dry out? I've read about people making collars out of plastic (milk cartons and the like) and putting them over the pots surface to stop too much water. Basically it was a circle with a circle cut out of the inside for the trunk and a slit cut through one side so you could manuever it around the truk.... I've also read where people will take a chopstick, poke it down to the bottom of the pot, wiggle it in a circle in the soil to make a little hole, and put turface/aquatic soil stuff down the hole-so basically you're adding to the soil without disturbing too much of the rootball.
A few of my trees I put under the patio table to keep them from getting any more water myself......... Just be careful about repotting sensitive species... I'd try to find a way to dry those plants out first.

One thing I have done when one of my plants with no drainholes got over watered at a fair was to lay paper towels on the soil surface and keep replacing them until they weren't soaking up any more water.... I used quite a few though! I've also read of taking the whole plant out of the pot and wrapping the rootball in paper towels to absorb extra moisture and not disturb the roots.
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