Hi Lindsay,

I'm sorry to hear about your grasshoppers!

As you have discovered, they can be difficult to control.  Part of the challenge is their mobility--even if you eliminated every insect on the property, more could just hop in!

Natural solutions are limited to covering plants of high value (like the vegetable or flower garden), hand-picking or using poultry to hunt them, and contact insecticides like neem oil or insecticidal soap.  These products need to contact grasshoppers directly to affect them; spraying your plants won't help.  Diatomaceous earth is not an effective insect control.

Some non-organic insecticides are options too for severe infestations; the most common and least impactful to non-target organisms are carbaryl-laced baits.  Because the insecticide needs to be consumed, pollinators are not affected.  

You do of course also have the option of doing nothing, and just living with them through the end of the summer.

This fact sheet contains more information: https://extension.colostate.edu/topic-areas/insects/grasshopper-control-in-gardens-small-acreages-5-536/

I hope this is helpful!

Cordially,

John