Will outdoor bleach used for cleaning decks kill shrubs?

Outdoor bleach, typically sodium hypochlorite, can be harmful to shrubs and other plants if not used properly. Here are a few reasons why outdoor bleach may kill shrubs:

High concentration: Outdoor bleach is often sold in concentrated form, and using it at full strength can cause severe damage to plant tissues. When bleach comes into contact with leaves, stems, or roots, it can burn and corrode them, leading to tissue damage and even plant death.

Altered soil pH: Bleach has a high pH level, making it alkaline. When applied to the soil around shrubs, it can alter the pH balance, making it more alkaline. Most shrubs prefer slightly acidic or neutral soil conditions. Prolonged exposure to alkaline soil can interfere with nutrient uptake and overall plant health, eventually leading to decline and death.

Phytotoxicity: Some plants are more sensitive to bleach than others. Shrubs like azaleas, rhododendrons, and camellias are particularly susceptible to bleach damage. These plants are acid-loving and can be severely affected by the alkaline nature of bleach.

Impact on beneficial organisms: Bleach can also harm beneficial microorganisms and organisms that live in the soil and help maintain soil health. These organisms assist in nutrient cycling, decomposition, and overall ecosystem balance. When bleach is used excessively, it can disrupt this delicate balance, affecting the soil's ability to support plant growth.

To avoid killing shrubs with outdoor bleach, take the following precautions:

Always dilute bleach according to the manufacturer's instructions. Never use bleach at full strength, as it can be highly corrosive.

Avoid spraying bleach directly on shrubs or their foliage. If bleach comes into contact with plant material, rinse it off thoroughly with water to minimize damage.

Apply bleach to the deck or other surfaces away from shrubs and other plants to avoid any potential drift or exposure.

Consider using alternative cleaning methods that are less harmful to plants, such as mild detergents or specialized deck cleaners designed for outdoor use.

Always follow the instructions on the bleach product label and take necessary safety precautions when handling bleach to protect yourself, your plants, and the environment.