Heat Defense Liquid Lawn Fertilizer (42.3 fl oz)

It's less effective once grass is already stressed. Heat Defense works best as prevention. If temps have been above 90°F for several days and your lawn is showing stress, water deeply and wait for a cooler stretch before applying.

Heat Defense is a fertilizer (12-0-4) with surfactant included. It feeds your lawn while improving water penetration. Drought Defense (0-0-1) is just a wetting agent with minimal nutrients. Use Heat Defense for regular summer feeding. Use Drought Defense as a targeted treatment when you need maximum water efficiency without adding nitrogen.

Heat Defense first if summer stress is your main concern. Wait at least 1-3 days between applications. If weeds are actively spreading, treat weeds first, then apply Heat Defense at least 24 hours later. The surfactant in Heat Defense can affect how weed control absorbs, so you don’t want to apply them too close together.

That's likely rust fungus, not a reaction to Heat Defense. Rust appears as orange-red powder on grass blades, especially in humid conditions. Heat Defense doesn't cause discoloration. Mow regularly to remove infected blade tips and the lawn should recover as conditions improve.