Feminized Seed Spray 8 oz - Easy STS Kit for 100% Female Seeds

In this review of the Feminized Seed Spray 8 oz STS kit, the bottom line is simple: breeders who need a straightforward way to produce feminized seeds will appreciate how this kit concentrates the proven Silver Thiosulfate method into a ready-to-use package. The reviewer finds it best for controlled breeding work where repeatability matters, because the proprietary aqueous STS solution is designed to block ethylene and reliably induce male flowers on female plants. It is not a consumption product and requires careful handling, but for saving phenotypes or creating specific crosses it delivers a clear, technical advantage.

Key Features

• Proprietary STS formula: The kit provides a concentrated Silver Thiosulfate solution that blocks ethylene and forces female plants to produce pollen-bearing male flowers.
• Complete spray kit: Comes as an 8 oz / 240 ml STS base with a spray bottle so breeders can mix, apply, and repeat treatments without sourcing separate reagents.
• Easy to use: Instructions recommend starting on day 1 of flower and repeating every five days to day 20-30, which simplifies scheduling during a breeding cycle.
• Effective for feminized seeds: Pollen produced by treated females can pollinate untreated females to create seeds that are expected to be 100% female.
• Safe when handled properly: The formula is described as non-toxic and non-allergenic, but treated plants should not be consumed and handlers are advised to wear gloves and protective clothing.
• Value for breeders: Contains enough STS to make roughly 8 oz of spray, suitable for many small or medium plants or one large plant for seed production.

Who It's For

This product is aimed at hobbyist and commercial breeders who want a replicable reversal method to save favorite phenotypes and produce feminized crosses. Growers who already understand flowering timelines and safe handling of lab reagents will get the most consistent results from the controlled application schedule.

It is less suitable for home gardeners seeking edible crops or people uncomfortable working with chemicals; treated plants are not for consumption and the spray can stain fabrics. Novice users who prefer non-technical methods may want to read the included instructions thoroughly before attempting reversal.

Pros & Cons

Pros

• Provides a focused STS solution that simplifies producing feminized pollen from females.
• Kit form removes guesswork about mixing volumes or sourcing a spray bottle.
• Well suited for saving phenotypes and producing consistent feminized seed lots.

Cons

• Customer reports are mixed on functionality, so individual results may vary by technique and plant.
• Treated plants are not consumable and the solution can stain, requiring careful handling and protective gear.

Specifications

Product	Feminized Seed Spray STS Kit
Volume	8 oz / 240 ml
Active method	Silver Thiosulfate (STS) aqueous formula
Intended result	Produce feminized pollen to make 100% female seeds
Application timing	Start day 1 of flower, repeat every 5 days until day 20-30
Use notes	Treated plants not for consumption; may stain fabrics

Our Verdict

The Feminized Seed Spray 8 oz STS kit is a practical, cost-conscious choice for breeders who want a repeatable reversal method and enough volume to service multiple small plants or one large specimen. It represents good value for those who follow the instructions and respect handling precautions; mixed customer reports suggest technique matters, but the underlying STS approach remains a proven route to feminized seeds.

Frequently Asked Questions

Will this make 100% female seeds?
When used as directed, pollen from reversed females is intended to produce feminized seeds; results depend on correct application and timing.

Is the treated plant safe to eat?
No. Plants treated with STS should not be consumed because they will bear pollen sacs and be coated with the solution.

How much spray does the kit make?
The kit contains enough STS base to make about 8 oz / 240 ml of spray, suitable for many small/medium plants or one large plant.