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Using Organic Neem Oil in the Garden

Mary Smith |

A magnificent oil with numerous benefits for both therapeutic and medicinal use. Among other properties, this oil is anti-septic, anti-viral, anti-bacterial, and anti-fungal. Used widely in creams, dental products, hair care products, and in gardens for natural pest control. Can be applied directly to the skin or included within skin care preparations that are designed specifically to treat problematic skin conditions. Our Organic Neem oil is cold pressed from whole Neem tree nuts.

The oil has a half life of three to 22 days in soil but only 45 minutes to four days in water. It is nearly non-toxic to birds, fish, bees and wildlife, and studies have shown no cancer or other disease causing results from its use. This makes neem oil very safe to use if applied properly.

Neem oil fungicide is useful against fungi, mildews and rusts when applied in a 1 percent solution.

Apply neem oil only in indirect light or in the evening to avoid the product burning foliage and allow the preparation to seep into the plant. Also, do not use neem oil in extreme temperatures, either too hot or too cold. Avoid application to plants that are stressed due to drought or over watering.

There has been concern about the use of neem oil and bees. Most studies specify that if neem oil is used inappropriately, and in massive quantities, it can cause harm to small hives, but has no effect on medium to large hives. Additionally, since neem oil insecticide does not target bugs that do not chew on leaves, most beneficial insects, like butterflies and ladybugs, are considered safe.
Organic Neem Oil is now available at Mary's Heirloom Seeds
2 ounces and 4 ounce options of Organic Neem Oil includes Amber bottle and detailed instructions
NEEM Oil Spray
from Mary's Heirloom Seeds 
This recipe is for edible vegetables and fruit, but be sure to wash all produce before cooking/eating (you can also use this on non-edibles too).

1/2 an ounce of organic neem oil  

1 teaspoon of natural liquid soap (preferably organic like Dr. Bronners etc).

2 quarts of warm water

Spray bottle

Mix all ingredients in a jug, then transfer to the spray bottle. This homemade pesticide works best when used fresh, so use within 24 hour of mixing it up.


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How to remove any excess neem oil that has not evaporated from vegetables such as broccoli,lettuce…etc. Farmers could be spraying oils excess neem oil throughout the growing of the vegetables and they may also use them during periods of high humidity, so how can we remove the oils that is left on this vegetables from the excessive use of it on the vegetable after we buy it from the store? Thank you!


From our article,
“The oil has a half life of three to 22 days in soil but only 45 minutes to four days in water”

So it is not just 45 minutes. While Neem Oil has a limited shelf life
once mixed, it is important to understand how neem oil works.

Neem oil works from inside the plant

Many insecticides break down quickly. They wash away with rain, or when irrigating, or the sunlight destroys them. You either have to spray all the time, or you have to spray something that’s so stable that it stays around forever. That means the chemical builds up everywhere and eventually poisons everything, including you.

Neem oil breaks down very quickly, too. It is especially susceptible to UV light. But neem oil is also a systemic insecticide. That means you can pour it on the soil (not pure neem oil of course, you use a dilution or extract) and the plants absorb it. They take it up into their tissue, and it works from the inside. A leaf hopper may take a couple of bites, but that’s it.

However, this does not work for all insect species. The neem ingredients accumulate in the tissues deeper inside the plant. The phloem, the outermost layer, contains hardly any. A tiny aphid feeds from the phloem, it can not penetrate deep enough to get a dose of neem. But any leaf hoppers, grass hoppers or similar chomping insects will be incapacitated quickly.

People eat neem leaves to cleanse the blood, stimulate the liver, and boost the immune system. So we certainly don’t need to worry about a bit of neem inside our lettuce leaves. To me this is a much more attractive option than having poisonous fungicides build up in my garden.

I hope this helps and answers any question you have about Neem Oil

Mary @ Mary's Heirloom Seeds,

If Neem oil only lasts 45 minutes in water, then how can it be effective at all? The delivering MEDIUM is WATER! ???


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