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Flower Shield

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Making Growing Simple, Exciting, and Easier to Succeed At

Flower Shield by Humboldts Secret is a alternative when it comes to pest management and made from products exempt from EPA registration under minimum risk pesticides according to FIFRA 25(b). Thousands of growers across multiple sectors use Flower Shield as a key component in their Integrated Pest Management Program.

Product Information

About Flower Shield

EXEMPT FROM EPA REGISTRATION: Humboldts Secret takes pride in creating products for your plants. You’ll be pleased to know that Flower Shield is made from products exempt from EPA registration under minimum risk pesticides according to FIFRA 25(b).

PEST MANAGEMENT: Flower Shield by Humboldts Secret is a pest management alternative that works as both a preventative and knock-down treatment for pests and fungus.

INSECTICIDE, PESTICIDE & MITICIDE: Our Flower Shield formula will kill mites, their eggs, and soft-bodied insects while also controlling powdery mildew. Weekly applications will create an environment that is lethal to pests and fungal spores, but not your plants.

WORKS ON CONTACT, NO IMMUNITY BUILDUP: Flower Shield is an insecticide, fungicide, and miticide that works on contact and does not allow immunity buildup. Insects cannot become immune to the ingredients found in Flower Shield.

CONTROLS POWDERY MILDEW: Our formula contains effective ingredients that control and prevent naturally without harming or affecting the environment of your plants in any way.

It’s important to shake the bottle thoroughly prior to use to make sure ingredients are appropriately mixed.

Measure out 0.5-2oz of Flower Shield. For your initial application, use 2oz/gallon of water. For ongoing maintenance and powdery mildew, use 0.5-oz/gallon of water.

Dilute your Flower Shield into your filled sprayer and thoroughly mix. It’s natural for the solution to separate from the water after it’s been mixed, so remember to give your spray bottle a shake every couple of minutes.

Apply your Flower Shield solution as a foliar spray only, never apply to the roots. IMPORTANT: Only apply Flower Shield in the very early morning, evening or when the main grow room lights are off.

We are confident that you will be pleased with your product and offer a 6 month 100% satisfaction guarantee.

Refer to our return policy for full terms for the satisfaction guarantee.

Frequently Asked Questions

FIFRA stands for the Federal Insecticide, Fungicide and Rodenticide Act and governs the regulation of pesticides in the United States by the Environmental Protection Agency (EPA). Under FIFRA section 25(b) Flower Shield qualifies as a Minimum Risk Pesticide as it poses little to no risk to human health or the environment and is exempt from registration with the EPA.

Flower Shield requires repeat application as it works on contact. Use Flower Shield as part of your integrated pest management system and apply as often as needed.

Although there is nothing harmful in Flower Shield and you can technically use it thru flower, as a good rule of thumb we don’t suggest applying anything too far into flower.

We recommend using it once it’s mixed, but you can keep it in a cool, dry and dark place for 1-3 days. Remember to shake thoroughly prior and during each use. PRO TIP: Depending on the size of the area you are treating, you may find that you don’t need an entire gallon of solution as with a foliar spray, a little goes a long way. Try diluting a smaller amount of solution: Add 1.5-2 teaspoons to a standard 16oz spray bottle!

Customer Feedback

Don’t just take our word for it..

Rated by hundreds of happy growers

Grow bigger plants in less time without struggle

Get the Startaer Kit for only $170.77 $119.99

Each Starter Kit Includes:

  • World's Best Base Nutrient System Grow & Bloom Base A and B (1/4 Gallon of Each)
  • Golden Tree (1/8 Gallon)
  • Flower Stacker (1/4 Gallon)
  • CalMag & Iron (1/4 Gallon)
  • Plant Enzymes (8 Ounces)
Customer Reviews
4.8 Based on 26 Reviews
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Filter Reviews:
Craig R.
United States United States
Flower shield

I can't say enough good things about the whole line of products from Humboldt secret. I won't use anything other then the line from now on. My cannabis plants love it

Richard S.

Awesome product

Keith R.


Wayne L.

I really love it I have seen a total difference in my plants since I have been using this product, I wish I knew about this a long time ago!!

Biron C.

I've received a flower shield sample @ MY LOCAL hydro shop. Shortly after i noticed some spider might damage to my leaves. I tried the flower shield. It was the best thing ever. Killed everything with 1 application. Had difficulty finding it after until i found Humboldts secret website. I now order exclusively through them. Get my products in 1-2 days.