7 Supplies for Setting Up a Greenhouse or Hoop House

Putting up a new greenhouse or hoop house is just the first step; the real work begins when you start outfitting the interior. An empty structure is just a shell, but the right equipment transforms it into a productive, controlled growing environment. These seven essential supplies will help you manage temperature, light, water, and workflow, setting you up for a successful first season and beyond.

Disclosure: As an Amazon Associate, this site earns from qualifying purchases. Thank you!

Key Gear for Your New Greenhouse Structure

A common mistake is spending the entire budget on the structure itself, leaving nothing for the internal systems that make it function. A greenhouse isn’t a passive sun-catcher; it’s an active environment that needs to be managed. Without proper ventilation, it can cook your plants in an hour on a sunny day. Without organized space and reliable water, it quickly becomes a chaotic, unproductive jungle.

Think of your new structure as a workshop. You need the right tools on hand to do the work efficiently. This means investing in gear that automates tedious tasks like venting, delivers water precisely where it’s needed, and provides you with the data to make smart decisions. The following items are the foundational toolkit for turning an empty space into a thriving greenhouse.

Ground Cover Fabric – DeWitt Sunbelt Weed Barrier

The floor of your greenhouse is your first line of defense against weeds, pests, and mud. Covering it with a quality ground cover fabric is a non-negotiable step for maintaining a clean and manageable space. It suppresses weed growth from below, keeps your feet and equipment clean, and helps moderate soil moisture by reducing evaporation.

The DeWitt Sunbelt Weed Barrier is the right tool for this job because it’s a woven polypropylene fabric, not a flimsy spun one. This construction makes it tough enough to walk on daily without tearing, and its UV treatment prevents it from breaking down in the intense sun of a greenhouse. Crucially, it’s permeable, allowing water to drain through so you don’t end up with puddles. The colored lines woven into the fabric every 12 inches also make spacing out pots or grow bags incredibly simple.

Before you buy, measure your greenhouse floor precisely and order a single piece large enough to cover the entire area, if possible, to minimize seams. You will need to purchase fabric staples separately to secure the edges and prevent it from shifting. This isn’t for growers using a permanent concrete slab, but for anyone with a gravel or soil floor, it’s the professional standard for a reason.

Automatic Vent Opener – Univent Standard Vent Opener

Greenhouse temperature can skyrocket with surprising speed, and manually opening and closing vents is a constant chore that’s easy to forget. An automatic vent opener is the single best investment for protecting your plants from overheating. It provides passive, reliable ventilation without requiring electricity or your constant attention.

The Univent Standard Vent Opener is a classic for a reason. Its design uses a wax-filled cylinder that expands when it gets hot, pushing the vent open, and contracts as it cools, allowing a spring to close it. It’s a simple, robust mechanical solution to a critical problem. The opening temperature is adjustable, typically between 60-77°F (15-25°C), giving you control over your environment.

This opener is designed for roof vents weighing up to 15 lbs. You’ll need one opener per vent. Be sure to disable or remove the cylinder in the winter if you expect heavy snow, as the weight could damage the opener or your vent. For the hobbyist who can’t be on-site 24/7, the Univent is an essential piece of insurance against cooked plants.

Temp & Humidity Monitor – AcuRite 00613 Digital Meter

You cannot manage what you don’t measure. A reliable thermometer and hygrometer (humidity gauge) is the dashboard for your greenhouse, providing the critical data you need to understand your unique microclimate. It tells you when to turn on a heater, when to increase ventilation, and whether your humidity levels are inviting fungal diseases.

The AcuRite 00613 Digital Meter is the perfect tool for this. It’s inexpensive, accurate, and, most importantly, it records the 24-hour high and low for both temperature and humidity. This historical data is far more valuable than a real-time reading alone; it shows you what happened overnight or during the hottest part of the day when you weren’t there. Knowing your nighttime low is crucial for frost protection, and seeing your daytime high tells you if your ventilation and shade strategy is working.

This is a simple, battery-operated unit. For the most useful readings, place it at plant level and out of direct sunlight, which can give you an artificially high temperature reading. You might even consider getting two—one for a cool spot and one for a warm spot—to understand the temperature variations within the structure. This is a must-have for every single greenhouse owner, regardless of size or experience.

Optimizing Your Greenhouse Airflow and Light

Once you have the basics of temperature monitoring and automatic venting in place, the next level of control involves managing airflow and light intensity. These two factors are deeply interconnected. Good airflow, driven by vents and fans, helps to moderate temperature, reduce humidity around plant leaves, and discourage fungal diseases like powdery mildew.

However, on intensely sunny summer days, even maximum ventilation may not be enough to keep temperatures down. This is where managing light becomes critical. Reducing the amount of solar radiation entering the greenhouse is the most effective way to prevent overheating. This doesn’t just protect plants from heat stress; it also prevents sun-scald on leaves and fruit, a common issue for crops like peppers and tomatoes. The goal is to find a balance: enough light for vigorous photosynthesis, but not so much that it creates a dangerously hot environment.

Shade Cloth – Coolaroo Knitted Shade Fabric (50%)

Shade cloth is the primary tool for reducing light intensity and heat. It’s essentially a specialized tarp that drapes over the outside of your greenhouse, acting like a pair of sunglasses to cut down on solar gain during the hottest months.

The Coolaroo Knitted Shade Fabric is an excellent choice because its knitted lock-stitch construction resists tearing and won’t unravel if cut. This is a major advantage over cheaper woven shade cloths. A 50% light reduction is a versatile starting point, suitable for a wide range of vegetables and flowers, preventing scorching without making the interior too dark. The material is also UV-stabilized, ensuring it will last several seasons out in the elements.

When ordering, measure the roof area you want to cover and purchase a piece slightly larger. You will need to buy clips or grommets separately to create attachment points for securing it to your structure with ropes or bungee cords. Shade cloth is absolutely essential for growers in hot, sunny climates but can be a season-saver even in more moderate zones during a heatwave.

Drip Irrigation Kit – DripWorks Small Farm Drip Kit

Consistent watering is the foundation of healthy plant growth, and hand-watering with a hose is inefficient, time-consuming, and often leads to inconsistent moisture levels. A drip irrigation system solves this by delivering water slowly and directly to the plant’s root zone, minimizing evaporation and preventing water from sitting on leaves, which can encourage disease.

The DripWorks Small Farm Drip Kit is a perfect entry point for outfitting a hobby greenhouse. It’s a comprehensive kit that includes high-quality mainline tubing, drip tape or emitters, fittings, a filter, and a pressure regulator—everything you need to get started. DripWorks uses standardized components, so it’s easy to expand or modify your system later. This kit is designed for the scale of a large garden or small farm, so it’s more than robust enough for a greenhouse.

Setting up a drip system involves a bit of a learning curve in terms of layout and assembly, but the kit comes with good instructions. You’ll need a reliable water source (like a spigot) and it’s highly recommended to add a battery-powered timer to fully automate your watering schedule. This is for the grower who wants to save time and water while dramatically improving plant health.

Greenhouse Benches – Gardener’s Supply Co. Potting Bench

Greenhouse benches are the key to creating an organized, ergonomic, and productive workspace. They elevate plants off the cold, damp ground, which improves root-zone temperature and air circulation, reducing the risk of soil-borne diseases. They also save your back by bringing your work up to a comfortable height for seeding, potting, and general plant care.

Gardener’s Supply Co. Potting Benches are well-regarded because they are designed by gardeners for gardeners. They offer a range of styles, from simple, sturdy staging benches to more elaborate potting stations with built-in soil bins and shelves. Look for models made from rot-resistant cedar or durable, recycled plastic. The key is sturdy construction that can handle the weight of wet soil and dozens of potted plants.

Before buying, carefully measure your greenhouse interior, leaving adequate room for pathways. Consider benches with slatted or mesh tops, which allow for excellent drainage and air circulation. While you can build your own, a well-designed, pre-fabricated bench is an investment in efficiency and comfort that pays off every time you step into your greenhouse. This is essential for anyone starting seeds or growing in containers.

Propane Heater – Mr. Heater Portable Buddy Heater

For most growers, the primary goal of a greenhouse is season extension—starting earlier in the spring and growing later into the fall. A small, reliable heater is the tool that makes this possible, providing crucial frost protection on cold nights. It can be the difference between losing an entire crop of tomato seedlings and getting a two-month head start on the season.

The Mr. Heater Portable Buddy Heater is an ideal choice for a hobby greenhouse because it’s affordable, portable, and designed with safety in mind. It has two critical safety features: an oxygen depletion sensor (ODS) that shuts it off if oxygen levels get too low, and a tip-over switch. It runs on standard 1 lb propane cylinders, making it easy to deploy, but can also be connected to a larger 20 lb tank with an adapter hose for longer run times.

It is absolutely critical to understand that this is a supplemental heater for occasional use, not a primary, thermostat-controlled heating system. You must ensure adequate ventilation when it’s running to prevent carbon monoxide buildup. Calculate the cubic footage of your greenhouse to ensure the heater’s BTU output is sufficient for your space. For the hobbyist needing to get through a few dozen frosty nights a year, this is the perfect, cost-effective solution.

Essential Tools for Greenhouse Plant Support

The protected, nutrient-rich environment of a greenhouse encourages vigorous, often vertical, growth. Plants like tomatoes, cucumbers, and pole beans will quickly become a tangled mess without proper support. Planning for this from the start saves you a massive headache later and leads to healthier plants and easier harvests.

Simple tools are often the best. A roll of strong jute twine is indispensable for creating vertical supports by dropping lines from the greenhouse frame. Tomato clips are small plastic fasteners that gently secure a plant’s stem to the twine without damaging it. For bushier plants like peppers, simple bamboo stakes or small wire cages are all that’s needed. The key is to install these supports early, before the plants get large and unruly.

Creating a Schedule for Greenhouse Maintenance

A greenhouse is a dynamic system that requires regular attention. Establishing a simple maintenance schedule prevents small issues from becoming big problems. A weekly walkthrough is a good habit to build. During this check, you’re not just watering; you’re actively observing.

Your weekly checklist should include:

• Pest Scouting: Check the undersides of leaves for common pests like aphids, spider mites, and whiteflies. Early detection is key.
• System Check: Ensure your automatic vent opener is functioning and your irrigation filter isn’t clogged.
• Data Log: Glance at the high/low readings on your temperature and humidity monitor to spot any unusual trends.
• General Tidiness: Sweep pathways, remove dead leaves, and keep tools organized. A clean greenhouse is less hospitable to pests and diseases.

Monthly tasks might include wiping down the glazing to maximize light transmission and testing the batteries in your monitors or irrigation timers. This routine takes very little time but pays huge dividends in plant health and overall productivity.

Your First Year: Setting Realistic Expectations

Your first year with a new greenhouse is less about maximum production and more about observation and learning. Every location is different, and your structure will have its own unique microclimate shaped by its orientation, surrounding trees, and local weather patterns. Expect a learning curve.

Use that first year to take notes. When does it start to get too hot in the morning? How quickly does the soil in your containers dry out? What pests seem to be most common in your area? Answering these questions through direct experience is far more valuable than anything you can read. Don’t be discouraged by failures; every wilted seedling or pest outbreak is a data point that will make you a better grower next season.

Outfitting your greenhouse is an investment in control, efficiency, and ultimately, success. By starting with these foundational pieces of gear, you create a manageable system that automates the tedious work and provides the information you need to grow healthy, productive plants. Start with this core toolkit, learn your structure’s unique personality, and enjoy the rewards of a well-managed growing space.