Potting mix comparison

Share your ideas on re-potting, potting mediums and fertilisers.
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Redsonic
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Potting mix comparison

Post by Redsonic »

I inadvertently did a potting medium experiment on some Bougainvillea cuttings at their first repotting. The ones in forestry tubes are destined for my Mother to plant on their acreage, so I used Searle's "premium" potting mix, with the fines sifted out. The one in the squat pot is my keeper and is planted in my diatomite/scoria/grit/pine bark mix.
All three were roughly the same size and had similar root deveolpment when I potted them three weeks ago. Same position and care, although the keeper has had a bit more water due to the open mix.
Cuttings2016.jpg
Pretty dramatic difference in growth. Sample size is too small to make a scientific judgement, but I thank Ausbonsai muchly for the wonderful advice given in this forum :worship:

I am new to bonsai (and horticulture in general) and, following the advice here, have been mixing my own substrate. With no prior knowledge to compare, I didn't know if my labour was worth it, but now I am convinced!
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Last edited by Redsonic on April 5th, 2016, 12:56 pm, edited 1 time in total.
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Re: Potting mix comparison

Post by kcpoole »

Well done :yes:
That result does not surprise me at all givent eh following,
viewtopic.php?f=12&t=18932
viewtopic.php?f=12&t=5138

and a link to my own testing here ( with other links off it
viewtopic.php?f=12&t=1879&start=0

Ken
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Re: Potting mix comparison

Post by treeman »

Redsonic wrote:I inadvertently did a potting medium experiment on some Bougainvillea cuttings at their first repotting. The ones in forestry tubes are destined for my Mother to plant on their acreage, so I used Searle's "premium" potting mix, with the fines sifted out. The one in the squat pot is my keeper and is planted in my diatomite/scoria/grit/pine bark mix.
All three were roughly the same size and had similar root deveolpment when I potted them three weeks ago. Same position and care, although the keeper has had a bit more water due to the open mix.
Cuttings2016.jpg
Pretty dramatic difference in growth. Sample size is too small to make a scientific judgement, but I thank Ausbonsai muchly for the wonderful advice given in this forum :worship:

I am new to bonsai (and horticulture in general) and, following the advice here, have been mixing my own substrate. With no prior knowledge to compare, I didn't know if my labour was worth it, but now I am convinced!
I'm afraid the only thing this proves is that the Searle's mix is substandard.
Mike
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Re: Potting mix comparison

Post by dansai »

Or watering more often gives better growth??
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Re: Potting mix comparison

Post by cmndapnda »

Redsonic wrote:The one in the squat pot is my keeper and is planted in my diatomite/scoria/grit/pine bark mix.
Red - Can you please specify your ratio?

Thanks. :)
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Re: Potting mix comparison

Post by Redsonic »

cmndapnda wrote:
Redsonic wrote:The one in the squat pot is my keeper and is planted in my diatomite/scoria/grit/pine bark mix.
Red - Can you please specify your ratio?

Thanks. :)
I use 25% Pine bark
20% scoria
45% diatomite
10% grit.

I included the scoria when I lost faith in diatomite after a very dodgy batch. The 10% grit is just to save a bit of money as I can get mine free from a local creek.
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