Organic Monterey Horticultural Oil (Gal)

Organic Monterey Horticultural Oil is a mineral oil spray that controls insects, mites, and fungal diseases on a wide range of crops, sold here in a one-gallon size. It is the same formula previously sold as Monterey Lawn and Garden SAF-T-SIDE. The oil contains 80% mineral oil (92% unsulfonated residue) and works by suffocating eggs, larvae, nymphs, and adults of soft-bodied insects, while as a fungicide it blocks pathogens from attaching to the plant.

At a glance

• Active ingredient: 80% mineral oil (92% unsulfonated residue)
• Size: 1 gallon concentrate
• Controls: Powdery mildew, rust, botrytis, mites, aphids, scale, leafminers, fungus gnats
• Mode of action: Suffocation of soft-bodied insects; barrier against fungal spores
• Use on: Fruit and nut trees, vegetables, berries, ornamentals, grasses

Best for

• Dormant-season treatment of fruit and shade trees
• Knocking down overwintering pests and eggs
• Managing powdery mildew, rust, and botrytis
• Soft-bodied insect control on ornamentals and vegetables
• Organic and integrated pest management programs

How to use

Mix with water at the label rate for your target pest and crop, then apply with a garden sprayer for total, even coverage, including the undersides of leaves where pests hide. Because the oil works by contact and suffocation, thorough coverage is essential. Apply in calm weather and avoid spraying plants under drought or temperature stress. Repeat as directed for ongoing control.

About Grow Organic

Grow Organic (groworganic.com) has supplied organic seeds, soil amendments, beneficial insects, and garden tools to home gardeners and small farms for decades, with a focus on sustainable, chemical-free growing.

Sold by Grow Organic, based in Grass Valley, California.