My Guide to Organic Pest Control in Your Garden
- Jason Smith
- May 15, 2023
- 3 min read
Organic Pest Control for Your Vegetable Garden: A Guide to Using Neem Oil, Spinosad, Bacillus thuringiensis(BT), and Pyrethrin If you're an avid gardener, you know that pests can be a big problem. But before you reach for chemical pesticides that can be harmful to the environment, consider using organic pest control methods instead. Here is the organic pest control routine I do here on Cog Hill Farm, and have been practicing this routine for years.
There are 4 organic pesticides I use, and they are Neem Oil, Spinosad, B.T., and Pyrethrin. Now 3 of these I rotate weekly, and those are Spinosad, B.T., and Pyrethrin, and then the Neem Oil, I use it every week. So for example, this week I will spray the garden with neem oil and spinosad, and then next week I will do nem oil and B.T., and then the next week I will do neem oil and pyrethrin, and continue this cycle every week throughout the growing season. Three big tips is, #1 I spray late in the evenings, because it does not cause the plants to get stressed out by having an oil standing on them in the blazing sun, and also is way better for the bees, butterflies, and any other beneficial insects or pollinators. #2 is you can mix the neem oil with any of these pesticides in your sprayer, and that will save you a lot of time. #3 is to pick a certain day of the week to be your spray day. This will become a recurring habit, and that way you will be less likely to forget about spraying or trying to remember when was the last time you sprayed your garden. Because here is the key thing about controlling garden pest organically, you have to be proactive and not reactive. Organic pest controls are typically great at preventing an issue or an outbreak, but if you wait till you have a major issue or an outbreak, then typically organic pesticides are not going to help or eliminate your issues. (Now if I had to choose just one combo it would be spinosad and neem oil)
Here is a link to purchase any of these: CLICK HERE

Neem Oil: Neem oil is derived from the neem tree and is a natural insecticide that is effective against a wide range of pests. It works by disrupting the insect's hormonal system, making it difficult for them to feed and reproduce. To use neem oil in your vegetable garden, mix 1-2 tablespoons of neem oil with one gallon of water and spray the solution onto the affected plants.
Spinosad: Spinosad is a natural substance derived from soil bacteria that is toxic to many types of insects. It works by affecting the nervous system of the pest, leading to paralysis and death. To use spinosad in your vegetable garden, dilute the product according to the instructions on the label and spray it directly onto the affected plants.
Bacillus thuringiensis (Bt): Bt is a naturally occurring soil bacterium that produces a toxin that is lethal to many types of insect larvae, including those of many moth and butterfly species. It works by breaking down the insect's gut lining, leading to death within a few days. To use Bt in your vegetable garden, mix the product with water according to the instructions on the label and spray it onto the affected plants.
Pyrethrin: Pyrethrin is a natural insecticide derived from the chrysanthemum flower. It works by attacking the insect's nervous system, leading to paralysis and death. To use pyrethrin in your vegetable garden, mix the product with water according to the instructions on the label and spray it onto the affected plants.
When using any type of pesticide, it's important to follow the instructions on the label carefully and to wear protective clothing and equipment, such as gloves and a mask. In conclusion, organic pest control methods such as neem oil, spinosad, Bacillus thuringiensis, and pyrethrin can be effective ways to protect your vegetable garden from pests without harming the environment. Happy gardening!
Jason
Cog Hill Farm







Fantastic insights! I appreciate how this article emphasizes the importance of using natural pest control plants for vegetable gardens. Incorporating plants like marigolds, basil, oregano, and dill can effectively deter pests while attracting beneficial insects. For instance, marigolds release a compound called pyrethrum, which repels various pests, and basil helps keep mosquitoes and flies at bay. Additionally, oregano and dill attract pollinators and beneficial insects that prey on harmful pests. By strategically planting these companions, gardeners can create a balanced ecosystem that minimizes the need for chemical interventions.
For more tips on sustainable gardening practices, visit: https://www.greenandprosperous.com/
I thoroughly enjoyed this article as I have started using Neem, BT and Spinosad separately. One thing I would caution about is the anti-bacterial properties of Neem oil as it will kill the BT bacteria. It is probably not a good idea to mix the two. However it won’t alter the effects of spinosad since that is only the byproduct of Saccharopolyspora spinosa bacteria and not the bacteria itself.
Thank you, this was very helpful. Now toes crossed, hopefully I will be successful. I have a tiny little garden and I have no problem gorwing but darn if the bugs (who knows what kind) don't always beat me! Y'all are constantly a gift that keeps on giving.
Hi Jason,
Thanks so much for posting this info. When you mix the Neem oil with any one of the 3 other products, if you were filling a 1 gallon sprayer would you put in the recommended amount of Neem oil for one gallon (say 2 oz) AND the recommended amount of Spinosad (2 oz); BT (1 oz), or Pyrethrin (1 oz) for 1 gallon into the sprayer? Or would you reduce any of the amounts so that the total additives equals (2 oz)?
Thanks so much!
Howdy Do Jason!, I love that you are doing this blog you are always so very thorough and exact when you talk about gardening I love watching you and I can hardly wait til next year so I can implement your style in my garden I love your systems, I'm thinking precisely of those Big Ol Blackberries' you're growing! I Just Love Ya all, and love watching all the animals. I look forward to more blogs.