---
product_id: 395679806
title: "Feminized Seed Spray | 8 oz/240 ml Bottle | Breed 100% Female Seeds (Feminized Seeds) | Silver Thiosulfate Spray Kit | STS Spray Kit | Reversal Spray (8 oz - with Spray Bottle)"
brand: "cannabinology"
price: "₨1431"
currency: SCR
in_stock: true
reviews_count: 8
category: "Cannabinology"
url: https://www.desertcart.sc/products/395679806-feminized-seed-spray-8-oz-240-ml-bottle-breed-100
store_origin: SC
region: Seychelles
---

# 100% feminized seed production 8 oz / 240 ml precise volume Proprietary Silver Thiosulfate formula Feminized Seed Spray | 8 oz/240 ml Bottle | Breed 100% Female Seeds (Feminized Seeds) | Silver Thiosulfate Spray Kit | STS Spray Kit | Reversal Spray (8 oz - with Spray Bottle)

**Brand:** cannabinology
**Price:** ₨1431
**Availability:** ✅ In Stock

## Summary

> 🌿 Breed Brilliance: Feminize with Confidence & Create Your Legacy!

## Quick Answers

- **What is this?** Feminized Seed Spray | 8 oz/240 ml Bottle | Breed 100% Female Seeds (Feminized Seeds) | Silver Thiosulfate Spray Kit | STS Spray Kit | Reversal Spray (8 oz - with Spray Bottle) by cannabinology
- **How much does it cost?** ₨1431 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sc](https://www.desertcart.sc/products/395679806-feminized-seed-spray-8-oz-240-ml-bottle-breed-100)

## Best For

- cannabinology enthusiasts

## Why This Product

- Trusted cannabinology brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Unlock Rare Genetics:** Save and propagate your favorite phenotypes with ease and accuracy.
- • **Ideal for All Breeders:** Whether novice or pro, streamline your breeding journey with this all-in-one solution.
- • **Precision Application Kit:** Complete spray bottle kit designed for easy, repeatable use from day 1 of flowering.
- • **Effortless 100% Female Seeds:** Harness the power of STS to guarantee pure feminized seeds every time.
- • **Scientifically Proven & Safe:** Non-toxic, non-allergenic formula trusted by breeders worldwide.

## Overview

The Cannabinology Feminized Seed Spray Kit is a scientifically formulated Silver Thiosulfate (STS) solution designed to reverse female cannabis plants, enabling breeders to produce 100% feminized seeds. This 8 oz (240 ml) kit includes everything needed for precise, safe, and repeatable application, making it ideal for both home growers and commercial breeders aiming to preserve and enhance their genetics with ease.

## Description

Cannabinology Feminized Seed Spray is an easy to use Silver Thiosulfate Spray Kit to make feminized seeds. This 8 oz / 240 ml STS based Feminized Seed Spray Kit contains enough Silver Thiosulfate (STS) to make 8 oz or about 250 milliliters of STS spray. Enough STS spray to sex reverse many small or medium plant or 1 large plant and perfect to make many thousands of feminized seeds!

Review: Works great, make hundreds of seeds. - This stuff is great, first time trying, i got a ton of pollen off the clone i sprayed with the spray. It made about 300 seeds on other clones. i dunno what the other users are complaining about, they mustve done something wrong because this definitely works 100%
Review: I used a different method - I used a different method, by mistake, I sprayed it five days in a row ,nighttime, then waited ,8 days for the last spray, I applied it,STS when it was just starting to flower, plenty of pollen, not a problem with this particular strain,RUNTZ, auto flower,

## Features

- EASILY MAKE 100% FEMALE SEEDS: The Cannabinology STS Spray Kit is easier to use and more effective than Colloidal silver and other reversal methods. This kit contains everything you need to sex reverse female plants and produce feminized seeds at home or in a commercial setting. This proprietary Silver Thiosulfate formula is proven to provide ease of use, accuracy, and repeatability to breeders across the country and around the world. Start your breeding journey today!
- SAFE & SCIENTIFIC: Cannabinology STS Spray is safe, non-toxic, and non-allergenic. However, a plant that is treated with STS should not be consumed (it will be covered in pollen sacs anyway) and it can stain fabrics. It’s always a good idea cover up and wear gloves when doing scientific work!
- HOW IT WORKS: The Cannabinology STS Spray Kit contains a proprietary aqueous formula of Silver Thiosulfate (STS). When applied to plants at, Silver Thiosulfate (STS) blocks the action of ethylene, the “female” hormone in plants. Blocking ethylene forces a female plant to produce male-type flowers, pollen sacks, and pollen. Since this pollen was made by a female, the pollen can be used to pollinate a non-treated female plant (or branch) creating feminized seeds which will be 100% female.
- HOW TO USE: Whether you’re just starting your breeding journey or are a seasoned breeder Cannabinology STS Spray Kits make it easy to make feminized seeds. Add water then a small amount of soap to the STS Spray bottle. Apply STS Spray to a female plant starting on day 1 of flower; repeat every 5 days until day 20 – 30. Pollinate a non-treated female plant. Grow the female plant until seeds are mature. For important tips on using Cannabinology STS Kits, see the included instructions.
- BENEFITS: Cannabinology STS Spray Kits provide new and seasoned breeders the easiest method of reversing female plants and producing feminized seeds. You can easily save your favorite phenotypes, produce new feminized crosses, and even flush out rare genotypic or phenotypic traits.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B09NF4G57W |
| Best Sellers Rank | #26,789 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #129 in Lawn & Garden Sprayers |
| Customer Reviews | 4.0 4.0 out of 5 stars (119) |
| Item model number | STS8 |
| Manufacturer | CBGYscientific |
| Product Dimensions | 4 x 3 x 6 inches |

## Images

![Feminized Seed Spray | 8 oz/240 ml Bottle | Breed 100% Female Seeds (Feminized Seeds) | Silver Thiosulfate Spray Kit | STS Spray Kit | Reversal Spray (8 oz - with Spray Bottle) - Image 1](https://m.media-amazon.com/images/I/61wiabPw7jL.jpg)

## Available Options

This product comes in different **Size** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Works great, make hundreds of seeds.
*by E***D on January 29, 2026*

This stuff is great, first time trying, i got a ton of pollen off the clone i sprayed with the spray. It made about 300 seeds on other clones. i dunno what the other users are complaining about, they mustve done something wrong because this definitely works 100%

### ⭐⭐⭐⭐⭐ I used a different method
*by A***R on November 22, 2025*

I used a different method, by mistake, I sprayed it five days in a row ,nighttime, then waited ,8 days for the last spray, I applied it,STS when it was just starting to flower, plenty of pollen, not a problem with this particular strain,RUNTZ, auto flower,

### ⭐ Ineffective
*by T***P on October 31, 2025*

Doesn’t work well. I bought a couple of the 8 oz ready to make bottles that worked. Then I bought a refill concentrate that straight up didn’t work at all, so I bought 2 more of the 8 oz ready to make AGAIN instead of the concentrate and they did not work either!!! Total waste of money, I can say that I previously had success but not anymore!!!

## Frequently Bought Together

- Cannabinology Feminized Seed Spray | 8 oz/240 ml Bottle | Breed 100% Female Seeds (Feminized Seeds) | Silver Thiosulfate Spray Kit | STS Spray Kit | Reversal Spray (8 oz - with Spray Bottle)
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*Product available on Desertcart Seychelles*
*Store origin: SC*
*Last updated: 2026-02-08*