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Organic carrots

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snottiegobble starts with ...
Since moving to WA I have grown my carrots above ground organically, but for some reason they never get really big, & they grow 'hairy' quite quickly. I know they like acid soil & only old manure/compost, but there is something they are lacking!
Anyone have the answer please?
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snottiegobble
Bunbury/Busso
26th April 2012 11:34pm
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Brendan says...
Hi SG,
People smarter than me say carrots need a pH of 6.5 to 7.5, so it's not exactly acid soil.
Also, they need more phosphorus then nitrogen & potassium.
When you say you grow them 'above ground', are they growing in straw like I used to grow potatoes? Search this forum for No-Dig Potatoes :-)
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Brendan
Mackay, Q
27th April 2012 6:52am
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snottiegobble says...
Brendan, they are in potting mix (top 7cm) into yellow sand. In the 3 years the bed has been in use I have added B&B, coffee grounds, various aged manures, dynamic L, clean kitty litter & fed with seasol, powerfeed, worm juice & occasional sulphate of Potash.
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snottiegobble
Bunbury/Busso
27th April 2012 11:37am
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snottiegobble says...
I also grew No-dig spuds in Vic. very successfully, but never used it for carrots due to possible forking problems!
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snottiegobble
Bunbury/Busso
27th April 2012 11:40am
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Brendan says...
G'day SG, most of those fertilizers (and the potting mix), are probably lacking phosphorus IMHO. Next time, try adding a good dose of Rock Phosphate (or Superphosphate :-) That should help.
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Brendan
Mackay, Q
28th April 2012 6:20am
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snottiegobble says...
Thanks Brendan, but superphos is a swear word in my book so will check out rock phosphate. Might try sticking the head of a match in next to some seedlings & see what happens!
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snottiegobble
Bunbury/Busso
28th April 2012 1:09pm
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Brendan says...
Yeah SG, know what you mean about superphosphate, I try to limit the use to approx. once a year.
Been meaning to tell you, hairy roots on carrots is usually from using too much fresh manure or very rich compost in the soil.
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Brendan
Mackay, Q
29th April 2012 6:41am
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KjW says...
G/day fella's
Here's a link for the optimum PH for Vegs I hope you find it helpful
> http://www.humeseeds.com/soilph.htm
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John42
Rockhampton
29th April 2012 7:22am
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Brendan says...
Thanks for that KjW. I thought the perfect pH for 'most' veggies was 6.4? (It used to be 6.5 :-)
This is where most nutrients in the soil become more available to the plant?
Pictures - Click to enlarge

Picture: 1
  
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Brendan
Mackay, Q
29th April 2012 7:49am
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snottiegobble says...
I am surprised that only peas like 7. I would have thought that onions, garlic etc would have been up there too & even celery!
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snottiegobble
Bunbury/Busso
29th April 2012 12:37pm
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KjW says...
6.4/6.5 I wouldn't worry about the difference

I think anywhere from 6.0 to 7.0 would be fine, except for some exceptions.
6.5 would be optimal.
That's one reason why rain water is so good for plants, whenever I've tested the PH of rain water it's always been around the 6.5 mark.
Town/Treated water supplies are usually put out with a PH of around 7.5+ to help combat corrosion in metal pipes, therefore not the best PH for growing veg's.
All I use to lower the PH is Aluminium Sulphate, a little bit goes a long way
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John42
Rockhampton
29th April 2012 5:36pm
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Original Post was last edited: 30th April 2012 3:04am

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