Liquid Copper Fungicide Spray is mixed with water and applied to a tree's foliage until the leaves are thoroughly wet, then reapplied every 7 to 14 days for as long as the disease stays active.

How Much Liquid Copper Fungicide Should Be Mixed With Water?

One gallon of mixed spray solution covers about 200 square feet of garden area, or up to two gallons for a single large tree. Liquid Copper Fungicide Spray goes on with a hose-end sprayer or a pressurized hand sprayer, whichever covers the tree's foliage more evenly.

How Thoroughly Should the Tree Be Sprayed?

Full coverage means wetting the foliage to the point of runoff, reaching all plant surfaces rather than just the top of the canopy. Missing the undersides of leaves or the inner branches leaves those surfaces unprotected against the fungus the spray is meant to control.

How Often Should the Spray Be Reapplied?

Treatment should begin at the first sign of disease and repeat every 7 to 14 days for as long as symptoms persist. A shorter interval on that range applies during frequent rain or when disease conditions are severe, since rain washes the protective coating off the leaves; reapplying [Liquid Copper Fungicide Spray] on that tighter schedule keeps the coverage active through wet stretches.

What Precautions Should Be Taken When Applying It?

Testing a small area of the tree first helps check for sensitivity, since the spray can cause some discoloration on certain foliage or blossoms. Contact with metal or masonry surfaces should also be avoided, since the copper can react with materials like galvanized roofing, and overspray shouldn't land on cars, siding, or outdoor furniture.

Frequently Asked Questions

How much does Liquid Copper Fungicide Spray cost?

$18.95 for one pint of concentrate, which treats about five to six large trees.

Can Liquid Copper Fungicide be used on any tree species?

Not universally. The product's own species table lists dozens of confirmed trees, so a specific species should be checked against that list, or test-sprayed first, before treating one that isn't named on it.

Does rain wash off the protective coating?

Yes. Rain washes the protective coating off the leaves, which is why reapplying sooner than the standard 7-to-14-day interval is recommended during wet weather.

Can the spray damage flowers or blossoms?

Yes, potentially. The label warns that the spray may cause some discoloration on certain foliage or blossoms, which is part of why test-spraying a small area first is recommended.