32oz Trigger Spray. Keep groundhogs (also know as woodchucks) from destroying your garden with our effective all natural groundhog repellent. Like all of our products, we only use natural botanical oils and other natural ingredients to repel groundhogs. Safe and Effective. I Must Garden’s All Natural Groundhog Repellent will keep groundhogs away from your plants in a safe and humane manner. I Must Garden never uses harmful chemicals so you can use our groundhog repellent around your pets and family without the worry of harmful pesticide or toxic chemicals. Our all-natural ingredients will not harm plants or turf and they are safe for the environment. I Must Garden’s Groundhog Repellent is an effective and long lasting treatment for all landscaped areas, and as an added bonus, it does not have an unpleasant scent to dissuade you from working in your own garden. We have the right size no matter the situation. Our Groundhog Repellent is available in a 32oz and 1 Gallon Ready-To-Use Spray and a 32oz Concentrate. The Concentrate makes 2.5 gallons of the Ready-To-Use, and our concentrated formula can be mixed and stored – it does not need to be used within 24 hours like many other chemical concentrates. For added protection, use I Must Garden’s Granular Animal Repellent along with our Groundhog spray to make sure you always have a layer of protection in any weather!