Longer Growing Season - Temperatures don't vary as much within a greenhouse, since the sun's radiation is trapped in the enclosure, retaining the heat within the structure.
Garden in Any Weather - You don't have to worry about getting wet since everything is covered. Even if it's pouring rain outside, you can garden and keep dry.
Grow a Wide Variety of Plants - Enjoy experimenting with exotic plants that are not found in the local area.
Protection from Pests and Predators - Helps prevent pests and predators like moles, deer, and squirrels from eating your harvest.
Keep Beneficial Insects Inside - Certain insects are beneficial to plants, such as ladybugs. In a greenhouse, beneficial insects can't easily leave.