Photo by Michelangelo Buonarroti

Guides | 09.11.2023

What Is The Best Homemade Bug Spray For Weed Plants?

The best homemade bug spray for weed plants is organic and can be made easily with things bought at the grocery store.

Cultivating cannabis, whether it’s tucked away indoors or basking outdoors, is a badge of honor for herb connoisseurs. But, let’s be blunt, successfully raising a cannabis crop can prove to be a thorny process.

A top challenge in cannabis cultivation is keeping creepy crawlies away from your prized garden. However, fending off these pests doesn’t always require a trip to the store for some off-the-shelf solutions. 

You can conjure up your very own effective homemade bug spray for weed plants at home, all without expending too much effort. A DIY 420 bug spray is at your very fingertips. 

Curious? Let’s weed out the mystery. 

Best Homemade Bug Sprays For Weed Plants

Most homemade bug sprays for weed plants use ingredients you already have in your kitchen, like soap, garlic, chili powder, and oil. The following DIY bug sprays will help you rid your garden of pests such as aphids, thrips, mites, whiteflies, and beetles.

Oil-Based Insecticide For Weed Plants

Oil-Based Insecticide for Weed Plants

Photography by Georgia Love for Herb

Oil-based insecticides for weed plants are crafted by marrying vegetable oils – canola, soybean, or cottonseed – with other ingredients. 

The potent oil-based potion works by clogging up the pores of pests like aphids, thrips, and mites, effectively suffocating them. 

Ingredients:

  1. 1 cup oil 
  2. 1 tablespoon of Castile soap 
  3. 1 quart of water 

Directions

  1. Mix 1 cup of oil with 1 tablespoon of Castile soap well 
  2. Take 2 tablespoons of mixture and dilute it in 1 quart of water 3. Put into a spray bottle and apply to weed plants 

Beyond this, you can explore the potential of essential oils, like eucalyptus, rosemary, and lemon. Simply mix them together, dilute with water, and spray directly onto your plants. 

Some home growers also swear by other essential oils, like cinnamon, clove, or coriander, applying them directly to cannabis leaves to repel pests. These oils are safe to use on cannabis plants without causing harm. 

However, be wary of applying essential oils directly to your buds as they could tweak the taste of your cannabis. 

Soap-Based Insecticide For Weed Plants

In the same vein as oil-based insecticides, soap-based varieties come to life by emerging soap and water, minus the oil. 

It can be sprayed on your weed plants at any time, but 

ilovemarijuanagrowing.com recommends it works best if applied at dawn or dusk. Soap-based insecticides are great for killing whiteflies, mites, and beetles. 

Ingredients:

  1. 1 ½ tablespoons of mild soap like Castile soap 2. 1 quart of water 

Directions

  1. Mix soap and water together. 
  2. Put in a spray bottle and apply directly to plants 

Neem Oil-Based Insecticide For Weed Plants

Neem oil is the belle of the ball when it comes to natural insecticides. It’s also a potent cure for cannabis plants under fungal attack. 

Neem oil is derived from the Neem tree which produces a few different components that kill bugs, as well as hinder their ability to feed. It also yield Azadirachtin, a hormone disruptor that makes it tricky for insects to grow and procreate. The Azadirachtin bonus? It curbs insect appetite and doubles up as a natural repellent.

Additionally, Neem oil is a strong ally against powdery mildew, a common fungal foe of cannabis. Though not a staple in your kitchen like other DIY bug spray ingredients, it’s been around for ages, winning hearts as a tried and true natural insecticide for cannabis and other plants alike. 

Ingredients

  1. 2 teaspoons of Neem Oil 
  2. 1 teaspoon of liquid soap 
  3. 1 quart of water 

Directions

  1. Combine all ingredients and shake well 
  2. Put in a spray bottle and apply directly to plants

Garlic-Based Insecticide For Weed Plants

Garlic-Based Insecticide for Weed Plants

Photography by Georgia Love for Herb

While garlic isn’t in the business of exterminating bugs, it’s a master charmer when it comes to repelling them, proving to be effective in curbing or halting infestations in their tracks. 

Ingredients

  1. 2 whole bulbs of garlic (not cloves) 
  2. ½ cup vegetable oil 
  3. 1 teaspoon of mild soap like Castile soap 
  4. 2 quarts of water 

Directions:

  1. Puree the garlic bulbs in a blender with a touch of water 2. Leave pureed garlic overnight 
  2. Strain garlic the following day 
  3. Combine garlic with ½ cup of vegetable oil, 1 tsp of mild soap, and 1 quart of water 
  4. Remove 1 cup of mixture and combine with another quart of water 6. Shake well and put in a spray bottle 
  5. Apply directly to plants 

Chili-Based Insecticide For Weed Plants

Chili-Based Insecticide for Weed Plants

Photography by Georgia Love for Herb

Much like garlic, chili peppers have a knack for deterring bugs. Although they won’t commit insecticide, their fiery presence can certainly discourage, slow, or even prevent infestations. 

Ingredients 

  1. ½ cup of fresh chilies or 1 tablespoon of chili powder 
  2. Liquid soap, like Castile 
  3. 1 quart of water

Directions for Fresh Chili Repellent 

  1. Puree chilies in 1 cup of water 
  2. Add 1 quart of water and bring to a boil 
  3. Allow mixture to cool 
  4. Strain out peppers 
  5. Add a few drops of liquid soap 
  6. Put the mixture in a spray bottle and apply directly to plants 

Directions for Chili Powder Repellent 

  1. Mix 1 tablespoon of powder with a few drops of soap and 1 quart of water 
  2. Put the mixture in a spray bottle and apply directly to plants

Tomato Leaf Insecticide For Weed Plants

Tomatoes, members of the nightshade family, contain alkaloids, potentially harmful to animals. Thus, the leaves of a tomato plant can play the role of bug repellants, much like garlic and chili. 

These alkaloids are especially proficient in discouraging aphids and other insects from inhabiting your cannabis plants.

Ingredients

  1. 2 fresh tomato leaves 
  2. 1 quart of water 

Directions

  1. Soak tomato leaves in 1 quart of water overnight 
  2. Strain liquid 
  3. Put in a spray bottle and apply directly to the cannabis’ leaves

Garlic, Onion And Cayenne Insecticide For Weed Plants

Garlic, Onion and Cayenne Insecticide for Weed Plants

Photography by Georgia Love for Herb

Some home growers have discovered that a blend of garlic, onion, and cayenne pepper powder creates a more potent natural bug deterrent than any of these ingredients alone. 

Ingredients

  1. 1 whole garlic bulb 
  2. a small red onion 
  3. 1 teaspoon of cayenne pepper powder 
  4. 1 tablespoon of liquid soap 

Directions:

  1. Puree garlic, onion, and cayenne pepper powder 2. Let the mixture sit for at least one hour 
  2. Strain 
  3. Add 1 tablespoon of liquid soap 
  4. Put the mixture in a spray bottle 
  5. Apply on the top and underside of cannabis leaves 

Herb Recommended Products:

Featured Brands:

Herb Recommended Products:

READ MORE