What is the recommended spacing between hoops in a DIY hoop house?
Jul 13, 2026
Building a DIY hoop house is one of the most practical ways to extend the growing season, protect crops, and create a more stable garden environment. But before choosing the cover, door style, or ventilation setup, one detail deserves careful attention: the spacing between hoops.
The recommended spacing between hoops in a DIY hoop house depends on snow load, wind exposure, hoop material, cover weight, and the intended use of the structure. For many small DIY hoop houses, hoops are often placed closer together than large engineered high tunnels because the frame materials may be lighter and less rigid.
For most small DIY hoop houses, 3 to 4 feet between hoops is a practical starting point in mild weather areas. In windy or snowy regions, closer spacing gives the frame more support.
University of Nebraska–Lincoln Extension notes that high tunnel hoops are commonly spaced at 4, 5, or 6 feet, and that narrower spacing gives more support to the polyethylene cover and helps shed rain and snow more easily. Wider spacing may require larger-diameter metal tubing to handle wind, rain, and snow loads.
That means there is no single spacing that fits every hoop house. A small backyard tunnel, a tall walk-in polytunnel, and a larger high tunnel may all need different frame spacing.
Quick Answer: Recommended Hoop Spacing
For a DIY hoop house, the recommended spacing between hoops is usually:
|
Site Condition |
Recommended Hoop Spacing |
|
Light snow and low wind |
3 to 4 feet apart |
|
Moderate snow or wind |
2 to 3 feet apart |
|
Heavy snow or strong wind |
1.5 to 2 feet apart |
|
Larger engineered high tunnel |
Often 4 to 6 feet, depending on tube strength and manufacturer design |
Why this range matters
Closer hoop spacing increases the number of support points along the tunnel. This helps the cover stay tighter, reduces sagging, and gives the frame better resistance against outside pressure. However, closer spacing also means more hoops, more connectors, more installation time, and a higher material cost.
The stronger the wind or snow risk, the closer your hoops should be. The stronger the tube diameter and frame design, the wider the spacing can usually be.
Factors Affecting Hoop Spacing
The original blog correctly identifies the main factors that affect hoop spacing. Below is an expanded version with more practical detail.
Snow Load
Snow is one of the biggest reasons to reduce hoop spacing. When snow sits on the cover, it adds downward weight. If the hoops are too far apart, the cover can sag between them. In serious cases, the frame may bend or collapse.
For snowy regions, tighter hoop spacing is safer. A spacing of 1.5 to 2 feet can be useful for small DIY hoop houses that use lightweight tubing and remain covered during winter. For larger manufactured tunnels, always follow the supplier's snow-load guidance.
The USDA NRCS High Tunnel System standard advises removing or rolling up covers at the end of the growing season where snow loads may damage the structure, unless the structure is designed by the manufacturer to withstand expected snow loads.
Wind Load
Wind does not only push against the sides of the hoop house. It can also lift the cover, pull at the anchors, and create stress at the end walls. In windy areas, closer hoop spacing helps the structure hold its shape.
For exposed gardens, open fields, coastal areas, or backyards with wind tunnels between buildings, spacing hoops 2 to 3 feet apart is usually safer than using wider spacing.
The USDA NRCS standard also recommends selecting a tunnel cover and structure designed to withstand expected wind loads, or managing the tunnel system in a way that limits wind damage.
Hoop Material and Size
Hoop material has a direct impact on spacing. Stronger hoops can be placed farther apart. Weaker or thinner hoops need closer spacing.
Common DIY hoop materials include:
- PVC pipe
- Galvanized steel tube
- EMT conduit
- Fiberglass rods
- Aluminum tube
For a long-lasting DIY hoop house, galvanized steel tube is usually stronger and more durable than standard PVC. It is a better choice for walk-in structures, larger covers, or year-round use.
Cover Material
The cover also affects spacing. A lightweight seasonal plastic film puts less weight on the frame. A heavier reinforced cover, double-layer cover, or polycarbonate panel needs more support.
If the cover is heavy, the hoops should be closer together. This keeps the cover from sagging and helps reduce stress at fastening points.
The NRCS standard states that polyethylene high tunnel covers should use a minimum 6-mil greenhouse-grade, UV-resistant material where polyethylene is used.
Intended Use
The purpose of your hoop house also changes the spacing decision. A low tunnel for seedlings does not need the same frame strength as a walk-in structure for tomatoes, trellised cucumbers, or heavy equipment access.
If you plan to grow tall plants, hang irrigation lines, install shelves, or use the tunnel through winter, closer spacing is safer.
Recommended Hoop Spacing Guidelines
Light Snow and Wind Areas
In areas with light snowfall and low wind, hoops can usually be spaced 3 to 4 feet apart. This spacing gives enough support for many small garden hoop houses while keeping the project cost reasonable.
This option works well for:
- Mild climates
- Backyard vegetable gardens
- Spring and fall crop protection
- Lightweight polyethylene covers
- Shorter hoop houses
Moderate Snow and Wind Areas
For areas with moderate snow or regular wind, use 2 to 3 feet between hoops. This tighter spacing gives the cover more support and helps the frame resist pressure from weather.
This option is suitable for:
- Walk-in DIY hoop houses
- Galvanized steel tube frames
- Seasonal winter protection
- Exposed garden locations
- Medium-weight covers
If you are unsure between two spacing options, choose the closer spacing. It usually costs more at the start, but it can reduce repair problems later.
Heavy Snow and Strong Wind Areas
In regions with heavy snow or strong winds, spacing hoops 1.5 to 2 feet apart may be necessary for smaller DIY structures. This tight spacing gives the cover more contact points and improves the frame's ability to hold its shape.
However, tight spacing alone is not enough. You should also consider:
- Strong ground anchors
- Ridge purlins
- Side purlins
- Cross bracing
- Secure end walls
- Proper drainage around the structure
- Removing snow quickly after storms
For large high tunnels, do not guess. Follow the manufacturer's engineered spacing and local snow or wind requirements.
How to Adjust Hoop Spacing for Your DIY Hoop House
Step 1: Check Your Local Weather Risk
Start by asking two questions:
- Does your area get heavy snow?
- Is your garden exposed to strong wind?
If the answer is yes to either question, reduce the spacing.
Step 2: Match Spacing to Hoop Strength
Thin PVC or small fiberglass hoops should be closer together. Galvanized steel tubes can usually handle wider spacing, especially when combined with purlins and proper anchoring.
Step 3: Consider the Tunnel Width
A wider hoop house creates a longer arch. Longer arches usually face more bending stress. If your hoop house is wide, reduce the spacing or choose stronger tubing.
Step 4: Add Purlins for Better Frame Support
Purlins run lengthwise along the hoop house. They help keep the hoops aligned and improve frame strength. UNL Extension explains that purlins maintain hoop spacing and increase structural strength.
Step 5: Follow the Kit Instructions
If you buy a hoop house kit, follow the manufacturer's spacing. The USDA NRCS standard says high tunnel structures should be planned, designed, and built from a manufactured kit according to manufacturer recommendations.
Benefits of Proper Hoop Spacing
Better Stability
Correct spacing helps the hoop house resist wind, rain, and snow. A stable frame is less likely to twist, lean, or collapse.
Longer Durability
A well-spaced frame spreads pressure more evenly. This reduces stress on the cover, connectors, and ground anchors.
Better Cover Performance
When hoops are correctly spaced, the cover sits more smoothly. This reduces sagging and helps water or light snow slide off more easily.
Better Functionality
Good spacing keeps the interior open and usable. It also supports ventilation, access, irrigation, and crop layout.
Better Cost Control
Correct spacing prevents two common problems: using too few hoops and weakening the structure, or using too many hoops where they are not needed.
Choosing the Right Hoop House Kit
As a DIY hoop house supplier, we offer different greenhouse and polytunnel kits for different garden needs. Choosing the right kit is not only about size. It is also about frame strength, cover type, anchor method, and hoop spacing.
Poly Tunnel Greenhouse Kits
Hoop house greenhouses are suitable for gardeners who need a walk-in growing space for vegetables, herbs, flowers, or seedlings. These kits are useful when you want a stable structure with a clear growing layout.
Walk In Polytunnels Steel Frame Kit
A polytunnel 4m x 3m is a better option for gardeners who need stronger support and easier access. Steel frame kits are especially useful for taller crops or areas with moderate wind.
Mini Polytunnel Greenhouse Kit
A Mini Polytunnel Greenhouse works well for smaller gardens, raised beds, and seasonal protection. Because these structures are smaller, closer hoop spacing can help keep the cover neat and stable.
USDA NRCS describes a high tunnel system, commonly called a hoop house, as a conservation practice that can extend the growing season, improve plant quality, improve soil quality, and reduce some transportation-related inputs.
Common Hoop Spacing Mistakes
Using Wide Spacing With Weak Hoops
This is one of the most common DIY mistakes. If the hoop material is light, wide spacing can cause the frame to bend.
Ignoring Wind Direction
If strong wind usually comes from one direction, the long side and end wall facing that wind need extra support.
Forgetting the Cover Weight
A heavy cover needs closer spacing than a thin seasonal cover.
Not Anchoring the Frame
Hoop spacing helps with frame shape, but anchors keep the structure on the ground. A well-spaced hoop house still needs secure anchors.
Final Recommendation
For most small DIY hoop houses, start with 3 to 4 feet in mild areas, 2 to 3 feet in moderate wind or snow, and 1.5 to 2 feet in heavy snow or high-wind areas. For larger engineered high tunnels, spacing may be wider, often 4 to 6 feet, when the frame uses stronger tubing and follows manufacturer design.
The safest choice depends on your climate, frame material, cover type, tunnel size, and use case. If you are unsure, choose closer spacing and stronger anchoring.
Building a DIY hoop house can be a rewarding and cost-effective way to protect plants, extend the growing season, and improve your garden's productivity. With the right hoop spacing and a reliable hoop house kit, you can create a strong, functional growing space that performs well through changing weather.