13 Jul 2012
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The buzz is the hydroponic industry is the leader in foliar feeding.  No surprise given most growers of 'ahem' certain plants are looking to increase their yield.  Rose aficionados should take note.  After all we also want lush plants and bigger blooms.  So hearing this from a couple of rose buds I decided to do some investigating.

CalCarb from XTreme Gardening is a calcium carbonate foliar spray which increases photosynthesis, prevents powdery mildew and helps to reduce plant stress.  It's nontoxic and makes up into a light and airy spray.  Mixed at the rate of 1 - 2 tablespoons per gallon of water, it is applied to the undersides of foliage which can be applied weekly.

I've tried it out in my home garden and the results have been remarkable.  The roses are happy, healthy with lots of new growth.  My 83 year old Mother asked me to get her some and now she's using it on her roses too.

CalCarb may be ordered online through Amazon, a 12 ounce package is about .  Here's the Amazon product description:

'Both calcium and carbon are critical to plant development. Calcium is generally supplied through the soil and carbon enters the plant as carbon dioxide which is necessary for photosynthesis to occur. CALCARB is a unique form of a simple and very common compound that contains both calcium and carbon. Calcium carbonate is used in agriculture throughout most of the world to adjust soil pH levels. CALCARB is an unusual form of calcium carbonate that is highly unstable, converting to calcium oxide and carbon dioxide rapidly when applied to foliage. This unique phenomena increases calcium avalability to plants through the foliage, but more importantly, the carbon dioxide levels directly outside and inside the stomata can rise threefold, which is near optimum for photosynthesis efficiency. Forget to water? Didin't remember to bring that tender houseplant in before the first cold snap? If it is not too far gone, treat it with CALCARB and you may be able to rescue it. CALCARB helps in recovery by increasing photosynthesis in the foliage that is not too seriously damaged and by raising the surface pH of damaged foliage which deters airborne pathogens from taking advantage of the weakened cellular tissue.'

If you try CalCarb out on your rosebuds, let me know!

- Beverly Rose Hopper