What is Silverthiosulfate (STS) Spray?

STS Spray is a chemical compound used in advanced horticulture to inhibit ethylene production in target plants, inducing the production of controlled pollen sacs. This pollen is then used to pollinate other target plants, resulting in 99.9% all-female offspring.

How do I mix STS Spray from a kit?

To mix STS Spray, dissolve Part A in distilled water, then dissolve Part B in a separate container of distilled water. While stirring rapidly, pour Part A into Part B. Never pour Part B into Part A.

How long does mixed STS Spray last?

Once mixed, Silverthiosulfate is highly sensitive to light and heat. It should be stored in a dark, refrigerated environment and used within 30 days for maximum efficacy.

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DEDICATED TO
CONSISTENCY
AND RELIABILITY.

ADVANCED HORTICULTURE
ETHYLENE CONTROL

We are committed to consistency and reliability in every product we craft. Our solutions help growers achieve high-quality seed production with confidence. A trusted partner and a solution you can rely on.

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Silver Thiosulfate (STS) Dry Powder Kit - Bulk Breeding

CA$89.99

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CRAFTED
WITH CARE

Carefully formulated and quality checked to ensure exceptional performance.

MADE
FRESH

Each batch is made fresh after your order is placed for maximum potency.

GUARANTEED
RESULTS

Trusted by growers worldwide for consistent, reliable and proven results.

WE SUPPORT
OUR CUSTOMERS

We're here to help with expert guidance and responsive customer support.

Our Mission & Ideals

Our mission is to make every customer feel supported and to have only the best product on the market. You can trust our reliability, accuracy, and attention to detail.

Unwavering Consistency

At the core of our values lies an unwavering commitment to consistency and reliability. We understand the importance of trust when it comes to high-quality pollen production.

Our Unique "Made Fresh" Method

Unlike mass-produced alternatives, each batch of our STS Spray is carefully crafted only after an order is placed, ensuring maximum potency and effectiveness.

Empowering Growers

Our ultimate goal is to empower growers to achieve success with confidence. We've spent years refining our techniques so you have the tools and support you need.

PROFESSIONAL CHOICE

Silver Thiosulfate (STS) Dry Powder Kit - Bulk Breeding

CA$89.99

Our flagship professional kit designed for commercial breeders and serious hobbyists. This dry kit makes 10 liters of ready-to-use Silver Thiosulfate (STS) solution when mixed. Extremely shelf-stable in dry form, allowing you to mix fresh batches as needed for consistent plant reversal results.

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READY TO USE

STS Spray (Silver Thiosulfate) - Ready to Mix 2-Part Kit

CA$54.99

Perfect for small-scale projects and immediate applications. Pre-mixed at precise horticultural stoichiometry, this ready-to-spray formula takes the guesswork out of plant reversal. Packaged in a UV-shielded amber glass bottle with a black trigger sprayer to preserve chemical integrity.

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STS Spray (Silver Thiosulfate) - Ready to Mix 2-Part Kit

SAFETY & ACCESSORIES

HORTICULTURAL GEAR

Ensure a clean, safe, and professional setup during your compounding workflows.

★★★★★

500ml Amber Glass Spray Bottle (Empty)

CA$8.40

Amber lab bottle for light-sensitive horticulture reagents and labeled greenhouse storage workflows.

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8ft Heavy-Duty Neon Green Protective Drop Cloth

CA$7.00

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★★★★★

CA$27.69

Safety goggles for silver thiosulfate, the active reagents, and greenhouse chemical handling workflows.

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Horticultural Journal

Latest STS & Breeding Research

Jun 01, 2026

Targeting Shoot Apices and Nodes for High-Efficiency STS Application

Searchers need to know where STS belongs on the plant without confusing broad foliar wetting with targeted plant-development…

Read Article →

May 25, 2026

Distilled Water vs Tap Water: Why Mineral Interference Matters for STS

Water quality is a high-intent guide topic because buyers want to prevent precipitation, staining, or poor response.

Read Article →

May 18, 2026

Ethylene Blockade Science: How Silver Thiosulfate Changes Plant Response

Ethylene is a small plant hormone with outsized effects on flower development, senescence, and stress response.

Read Article →

The Science of Pollen Production

Dedicated to Consistency and Reliability

Freshly Compounded to Order

To guarantee maximum chemical activity and peak potency, our Silver Thiosulfate is compounded immediately before dispatch. Unlike pre-mixed products that degrade on warehouse shelves for months, our fresh-batch guarantee ensures consistent receptor blockade for every breeding run.

CAD Base / Live USD Exchange

We charge in Canadian Dollars (CAD) to reflect our local manufacturing origin while providing real-time live currency display in US Dollars (USD). No hidden fees, no conversion surprises—just direct, transparent pricing for seamless North American ordering.

Discreet & Secure Shipping

Shipped daily from Canada using priority channels with tracking. Every bottle is sealed in double-barrier light-proof protective packaging to ensure zero light degradation or leaking during transit.

Direct Horticultural Support

Breeding programs require precision. Our dedicated support team—comprising experienced plant physiologists and growers—is available via email, phone, Instagram, and live chat to assist with dilution math, timing, and troubleshooting.

Extended Research