alphacat said:Miracle Gro - and many other chem nutes - do indeed contain radioactive ingredients. In fact, when Miracle Gro was first released onto the market in the 50's (before people fully understood the long term buildup/toxicity issues), they used to advertise about their proprietary blend of stuff including 'radioactive isotopes'. When the public started getting wiser about the issue they discreetly dropped the isotope reference, but not the actual compounds.
This article's been re-posted here a few times - and some folks take exception to it various grounds, like the fact that one of the scientists cited has his own line of nutes - but it's better to know and make your own decision than remain ignorant and never have the option.
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Radioactive buds?
New study shows that many fertilizers are radioactive, producing potentially harmful pot.
By David Malmo-Levine and Dana Larsen
A recent study shows that many commonly used fertilizers are high in radioactive elements. The study was performed by Dr Paul Hornby, who holds a master’s degree in biochemistry and a PhD in human pathology from the University of British Columbia.
The study analyzed 25 different types of fertilizers, eight “organic” varieties and 17 “chemical” fertilizers. The results showed that the chemical fertilizers emitted on average five times the radiation of the organic group.
There are different ways of measuring radioactivity. The table shows the “counts per minute” (CPM) of radiation detected in each sample. The average for the organic fertilizers was 140, while the chemical fertilizers had an average radiation count of 675, an almost five-fold increase.
The lowest radiation was found in the organic blood meal fertilizers, which emitted only background radiation - the normal low radiation found in most objects. On the other end of the spectrum was the 5-20-20 berry food, with a radiation level about 24 times higher than background.
These levels of radiation don’t pose a danger through simply being around bags of fertilizer. However, cannabis and other plants are known to uptake radioactive elements from their growing medium. Radiation exposure is accumulative, so that repeated inhalation would present an increasing health risk.
Radiation also accumulates in the soil. Farmers who grow chemical-fed tobacco soon face soil vitality-loss, forcing them to use more and more chemical fertilizer every year to maintain the same level of productivity. That means that tobacco land gets more and more radioactive every year.
Numerous studies published in the New England Journal of Medicine and other health, science and radiation journals have indicated that it is the radioactive elements in tobacco which lead to lung cancer (CC#35, Radioactive tobacco). Tobacco is typically fed with high-phosphate, chemical fertilizers, including heavy foliar spraying. All of these factors would produce a high-level of radioactive elements in the tobacco leaf.
Although further research is needed, this study does point the way to some simple harm-reduction techniques for pot growers. Many growers believe that using organic fertilizers produces a tastier, higher-quality bud. This study indicates that they could also be producing a less harmful product than that produced with many chemical fertilizers.
Although cannabis and cannabinoids are non-toxic, radiation is a major cause of cancer. Further research is clearly needed, but it seems likely that the best way to keep your buds as safe and harmless as possible is to use non-chemical, organic fertilizers, to eliminate any potential radioactivity getting into your stash, and your lungs.
· Dr Paul Hornby is available for testing of fertilizers and can also test marijuana for cannabinoid profiles: [email protected]
Fertilizer Type............................................Radioactivity score
Evergro Specialty Fertilizer..........................90
Blood Meal 12-0-0
Green Valley....................................................96
Blood Meal Fertilizer
12-0-0
RainGrow Organic Fertilizer.........................102
Bloom-A-Long
0-12-0
SeaSpray Organic Fertilizer..........................125
0.5-1.0-0.5
Green Valley Blood and Bone..........................154
Meal Fertilizer
7-11-0
RainGrow Organic Fertilizer..........................160
4-2-3
Homestead 100% Organic................................174
Bone Meal
4-14-0
DML Bird Guano...............................................178
NPK unknown
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Those above are all organic.
Those below are all synthetic.
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Miracid Soil Acidifier...................................248
Plant Food
30-10-10
Shultz All Purpose Plant Food.......................258
10-15-10
Miracle-Gro For Roses...................................285
18-24-16
Green Valley....................................................326
Rhododendron and Azalea Food
10-8-6
Shultz African Violet Plus...................................393
8-14-9
General Hydroponics..............................................400
Flora Grow
2-1-6
Miracle-Gro Water Soluble..................................409
Plant Food
15-30-15
Greenleaf Evergreen...............................................437
Tree and Hedge Feeder
13-6-7
Stern's Miracle-Gro..............................................538
For Tomatoes
18-18-21
Miracle-Gro...........................................................547
Plant Food Engrais
15-30-15
Greenleaf Shur Gro....................................................672
Soluble Plant Food
20-20-20
Greenleaf Shur Gro....................................................693
Soluble Plant Food
20-20-20
Shultz-Instant.............................................................740
Orchid Plant Food
19-31-17
Shultz Tomato Plus....................................................874
18-19-30
Evergro Fruit Tree....................................................1037
and Berry Food
4-20-20
Osmocote....................................................................2021
Time Release Fertilizer
18-6-12
Green Valley Berry Food...........................................2384
5-20-20
budvapor said:how about MG soil? i've tested different types/brands available at local stores like walmart and lowe's, and the regular MG potting soil seems to consistently lead to faster growth... i would imagine the same problems mentioned about the ferts apply to the MG soil...? i'm still going organic, but i was curious to try it, and i'm curious if anyone has more info on that...
HeadyPete said:Of course the MG potting soil is as bad as the fertilizers. Same stuff.
Any chem based fert is going to be much more toxic than any organic nutrient.
Strong chem ferts will lead to faster growth, but they work on a whole different principle than organics.
Chem ferts are produced as salts, heavy metals, minerals, etc which are readily available to the plant, whereas organic ferts must break down in the soil first, before a plant can use them. Chems feed the plant, Organics feed the soil, which feeds the plant. Science tries to do what nature does, but on a very simplistic scale. As usual, arrogant man feels he can do better what Mother Nature has done perfectly since the beginning of time.
Chems will degrade the biological action of your soil, kill the micro flora and fauna, drive away earthworms, etc. This is more for general gardening than MJ growing. Your lawn (or soil grown mj) will be better with organic ferts. Compost, guanos, castings are high in microbial activity, and they improve soil over time. Humus is produced, holding the soil together, trapping nutrients, and holding moisture. Humus is very important to soil biology.
The biggest concern is the health issues from chems. They may grow great petunias, but they harm the environment, and pose a health risk to humans, especially through consumption.
Organic weed smells better, tastes better and is better for you, just like a tomato.
SolarT said:I used to thnk people must be CRAZY to pay $24 for a bag of dirt.
call me crazy.