Frequently Asked Questions

Engineered Greenhouse Plans

Hortitech Greenhouse is able to engineer personal and commercial greenhouse structures including the structural plans, site plans, traffic analysis, erosion, etc.

Shipping We offer either delivery or pickup for any manufactured components, kits or any large quantity purchased materials. Small quantities can be shipped via UPS or FedEx or picked up from our location 63176 Nels Anderson Rd Ste 150 in Bend, Oregon.

FAQ - Heating Question: How do determine what size heater I need? Answer: Using our btu calculator located on our tools tab or give us a call to speak with a specialist.

Question: Can I use a kerosene heater? Answer: kerosene heaters will work if you buy the right model. If the model does not burn cleanly it will produce toxic carbon monoxide as well as release a odor. A good rule of thumb is that if you see a red flame it is toxic, if it is all blue you should be fine.

FAQ - Coverings

Q: Can I use regular plastics like Visqueen or other polyethylene films from Home Depot or Lowes to cut costs?

A: A generic polyethylene film is designed to accommodate simple applications and does not have properties supportive of plant growth. Generic films are especially lacking UV coatings which protect against yellowing and cracking in the sun. Our line of plastics have high durability, toughness, higher light transmission, and higher puncture and tear strength, among other useful properties. Although generic plastics have lower initial costs, at bare minimum regular replacement costs and reduced light transmission drive up overall costs in the long run. Starting out with the right coverings drives overall costs down and improves crop returns which far outweigh initial savings with generic film.

How many different grades of plastics are there? What are the benefits of higher grades?

There are different poly types and grades for each grow operation and climate. Choosing the right covering will provide the best environment for plants and result in the higher yields and keep costs down. Reach out to us to get a film recommendation for your application.

How does light diffusion help the plant?

Much of the useful light plants get from the sun hits the leaves directly, but some light bounces off of various surfaces and reaches the leaves indirectly. Depending on climate, sun intensity, and plant type, there’s an ideal amount of direct sunlight the crop should get. Beyond this direct light threshold, diffuse light can further increase useful light for the plant. Polys can be used to both limit direct sunlight to protect the plant, and turn that excess direct sunlight into diffuse light to achieve an optimum rate of photosynthesis and further increase yield and quality. A plant can benefit from the scattering of sunlight rays and grow up to 30% faster when all leaves are bathed in light, not just the upper canopy.

How can you tell if a poly has aged poorly?

Greenhouse poly degrades as the material ages. Many growers replace covering after they show visible signs of wear to save on cost. There are hidden costs associated with poorly performing plastics, however, which should be avoided when possible prior to visible degradation. Yellowing, darkening, scratching, cracking, punctures, and tearing can all impact performance and reduce crop quality and growth rate in different ways. For example any degradation which creates a roughened surface texture can provide a foothold for mold. A yellowed surface can simply block useful spectrum and slow down the growth rate of the plant. Cracking, tearing,and punctures can affect overall temperatures in the greenhouse as well as introduce unwanted temperature variations to plants closest to the leaks. Darkening usually happens more in certain zones than others creating inconsistency between plants. There are already so many factors that can negatively affect plants, eliminating the easy ones is highly desirable.