Choosing the right greenhouse size is one of the most important decisions you'll make. While it's tempting to purchase a smaller greenhouse to save space or money, many greenhouse owners quickly discover they need more room than they originally expected.
The best greenhouse size depends on your gardening goals, available space, and future plans.

Consider What You Want to Grow

Before choosing a greenhouse, think about how you plan to use it.
Are you looking to:
  • Start seedlings each spring?
  • Grow vegetables throughout the season?
  • Create a dedicated flower-growing space?
  • Extend your growing season into the fall and winter?
The more plants you intend to grow, the more space you'll need for walkways, shelving, and future expansion.

Small Greenhouses: 8x8 - 10x12

A small greenhouse is a great option for homeowners who are just getting started. It provides enough room for a variety of plants while fitting comfortably in most backyards.
This size is ideal for:
  • Beginner gardeners
  • Seed starting
  • Herbs and flowers
  • Small vegetable gardens

Medium Greenhouses: 12x16 - 12x20

Our 12x16 - 12x20 greenhouses are among the most popular sizes.
These models provide additional growing space while still fitting well on most residential properties.
A medium-sized greenhouse offers room for:
  • Multiple growing tables
  • Larger vegetable gardens
  • Hanging baskets
  • Additional storage space
For many homeowners, a 12x20 greenhouse provides the perfect balance between space and affordability.

Large Greenhouses: 14x28 and Beyond

For serious gardeners and hobby growers, larger greenhouse models offer maximum flexibility.
Benefits include:
  • More growing area
  • Additional shelving options
  • Space for larger plants
  • Greater room to work comfortably
Many customers who plan to grow a significant amount of produce or spend substantial time gardening choose a larger greenhouse from the start.

Think About Future Growth

One of the most common things greenhouse owners say is:
"I wish I had gone bigger."
As your gardening experience grows, so will your need for space. Choosing a slightly larger greenhouse today can help prevent outgrowing your greenhouse in the future.

Need Help Choosing?

At Pennsylvania Amish Structures, we offer Amish-built greenhouses in a variety of sizes and styles to fit every property and gardening goal.
If you're unsure which greenhouse size is right for you, our team would be happy to help you compare options and find the perfect fit.
Contact us today to request a quote or learn more about our available greenhouse models.