Physan 20 Orchid & Ornament Disinfectant Fungicide Sanitizer Deodorizer Algaecide Virucide - 1 Pint

Physan 20 Orchid & Ornament Disinfectant – Multi-Purpose Fungicide, Bactericide, Virucide, Algaecide & Greenhouse Sanitizer

Physan 20 Orchid & Ornament Disinfectant is a concentrated, multi-purpose antimicrobial solution formulated for orchid care, ornamental plant programs, and greenhouse sanitation. Its dual quaternary ammonium formula provides label-directed bactericidal, fungicidal, virucidal, and algaecidal activity, making it a versatile choice for professional growers, commercial nurseries, greenhouse operators, and serious plant enthusiasts.

When applied according to label directions, Physan 20 helps reduce the spread of plant pathogens on pre-cleaned, hard, nonporous surfaces such as greenhouse benches, floors, walls, tools, pots, flats, trays, and flower containers. Separate application directions cover orchids, seedlings, selected ornamentals, greenhouse glass, algae-prone walkways, and other labeled horticultural uses.

Unlike products that rely on a single dilution for every task, Physan 20 uses application-specific mixing rates. This allows growers to prepare the appropriate solution for sanitizing equipment, treating algae, dividing orchids, managing certain orchid diseases, or maintaining cleaner propagation and growing areas.

Product at a Glance

Physan 20 is registered as a disinfectant, antimicrobial, bactericide, fungicide, virucide, and algaecide. Its permitted application methods include spraying, washing, soaking, and dipping, subject to the directions for the particular plant or site.

Key Benefits

Comprehensive Greenhouse Sanitation

Physan 20 can be used to disinfect hard, nonporous work surfaces and growing equipment that may contribute to cross-contamination. Properly diluted solution can be applied to benches, tools, pots, flats, floors, and walls after visible soil and debris have been removed. Hard surfaces must remain thoroughly wet for 10 minutes, and a fresh solution should be prepared daily or whenever it becomes visibly dirty.

Specialized Orchid Care

The label provides distinct rates for adult orchids, seedlings, plant division, Botrytis, Phalaenopsis crown rot, and certain bacterial rots. These targeted directions make Physan 20 particularly valuable for growers managing collections in humid environments where moisture, contaminated tools, used pots, and crowded benches can increase disease pressure.

Tool, Pot, and Propagation-Area Hygiene

Cutting tools can transfer pathogens from one plant to another. Physan 20 can be used as a tool-soaking solution before pruning, dividing, or removing diseased tissue. It is also labeled for soaking pre-cleaned pots and flats before reuse, supporting better sanitation between plants and propagation cycles.

Algae Control

Physan 20 provides separate directions for controlling algae on greenhouse glass and heavily affected walkways. The correct dilution depends on the surface being treated, so growers should not use one general algae-control rate for every location.

Active Ingredients

Physan 20 contains 20% total active quaternary ammonium compounds.

Selected Mixing and Application Rates

These are selected label rates, not a complete substitute for the product label. Always match the dilution to the exact plant, pathogen, surface, and application method being treated.

Ideal Applications

Physan 20 is especially useful for:

Why Choose Physan 20?

Physan 20 combines several horticultural sanitation functions in one concentrated product. Rather than purchasing separate solutions for tool sanitation, greenhouse-surface disinfection, algae management, and selected orchid applications, growers can prepare task-specific dilutions from one container.

Its versatility makes it a practical addition to greenhouse sanitation programs, orchid-care routines, repotting and division work, propagation-area maintenance, and between-crop cleanup. Used correctly, it helps maintain a cleaner growing environment and reduce the opportunity for labeled plant pathogens to spread through contaminated equipment and hard surfaces.

Important Safety and Use Information

Physan 20 concentrate carries the signal word DANGER. It is corrosive and can cause irreversible eye damage and skin burns. Applicators and handlers must wear the personal protective equipment specified on the product label, including protective eyewear, waterproof gloves, long sleeves, long pants, shoes, and socks when required.

The product is toxic to fish and must be handled according to its environmental hazard directions. It is not intended for use in domestic greenhouses where food crops are grown. Do not use a dilution rate from one application for a different plant or surface, and do not apply through an irrigation system unless the current legally registered label specifically permits the intended use. State registrations and approved application sites may vary, so the container label and applicable supplemental labeling must always be followed.

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