firstly, need some feedback for the use of osmocote. I have been using it for some time now, but never really did any comparison between plants with this in the soil and those without. Those who have experience, what are your views ont his? what are the suitable application rates?
secondly, just out of curiosity, what are the main reasons for adding vermiculite to a soil mix? I know nep growers who recommend it, but I have never really considered why and how it is beneficial. Was preparing soil mix when came across an old packet of this, so just conveniently added some into the mix. I only know it is not harmful....
Please feel free to write comments and experiences regarding these 2 commerial products
Post by Kyle (Carnilvr79) on May 20, 2014 4:29:29 GMT 7
CAUTION: VERMICULITE NEUTRALIZES PH! I was trying to be a "short-order-chef" and mixing whatever in soils and just not doing the research before I planted. I once poured a very concentrated solution of "Ph-Down" (i.e. 4 drops to a gallon lower to 4.9ish), I put nearly a capful in 2 Liters! And I measured the soil acidity later and it was 6.8!!!!! A few days later, it was back to 7! Also, Cedar shavings do the same thing! I found this out through personal trial and error on my blueberries (which need rather Acidic soil conditions).
Although, I would have to also admit I am using a cheapo Soil Ph Rapitester from Fred Meyer - so the numbers may not be all that accurate. I am getting a Blue Lab one here shortly and will re-do the experiment. However, my data I have already gotten is similar to what other's out there have found out.
SO, if your plant wants an acidic soil, I will NEVER put vermiculite nor Cedar shavings anywhere near my plants that want an acidic soil. These additives are GREAT for other plants though (like pumpkins). I found out that Douglas Fir shavings acidify. Just can't seem to find them anywhere.
Madness is doing the same thing time and again and expecting a different result. - Einstein (Stoopid Rainbow 6)
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