Greenhouse Recommendations for

New York

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New York Specifics

What greenhouse shape makes more sense to build in New York? Quonset or Semi Gable?

Semi Gable frames are used in areas with snow and high humidity. The steep pitch of our semi gable frame allows for the snow to shed on its own. The increased peak height allows for heat and humidity to rise off the plant canopy and be exhausted by a peak fan.

Will I need a heater for my greenhouse in New York?

Review the historical average low temperatures for your zip code and be sure there's no chance of frost during the window in which you'll be growing. If growing year round, or planting early in the spring chances are a heater will be needed. Using a heater in conjunction with exhaust fans can greatly reduce night time humidity in the greenhouse.

Should I invest in an advanced environmental controller for my greenhouse?

Upgrading your environmental control system to the competitively priced agrowtek gcx is necessary in any instances where you are using artificial lighting, heating, or want programmable controls with different stages of heating/cooling. Example features include: Turning lights on and off based on cloud cover, interrupting functions such as heat when the exhaust fan turns on, using heat or cooling stages to even out the temp/humidity swings to create more consistent growing conditions. Analog controls can be used if you are just concerned with one or two variables. Be aware that if the heater and exhaust fans are on separate thermostats, they can both get stuck on at the same time, this will drain the propane tank and prevent the greenhouse from getting up to temp.

Is an evaporative cooling system (wet wall) recommended to cool greenhouses in New York?

New York has higher than average humidity during the summer months which greatly reduces the effectiveness of the evaporative cooling system. Use historical weather averages to understand your climate during the growing season and opt for a wet wall if your humidity is below 70%. Example from UMASS: 90 degree outside air @30% humidity = 30 degrees of cooling, the same at @50% humidity = 20 degrees of cooling, the same air @70% humidity = 8 degrees of cooling

Which ventilation option is better for my greenhouse in New York?

Roll-up sides are ideal for areas with moderate climates and predictable weather patterns. They provide natural ventilation and are energy-efficient. However, they can be less effective in regions with high winds, as the sides may flap and damage crops or the greenhouse structure. Consider adding wind retention systems to mitigate this issue. Use exhaust fans in areas with extreme heat or humidity where precise climate control is necessary. They actively pull hot air out of the greenhouse, allowing for more consistent temperatures. Pairing exhaust fans with HAF circulatory fans ensures even air distribution and reduces hotspots inside the greenhouse.

Should I use double poly with inflation for my greenhouse in New York?

Yes! Double poly with inflation provides excellent insulation and is ideal for areas with significant temperature fluctuations or cold climates. The inflated air layer acts as a thermal barrier, reducing heating costs and condensation during winter and maintaining a more stable growing environment.

Pro Tip: Increase the performance of your double poly setup by using a layer of infrared/anti condensate 6mil underneath a layer of woven 9mil.

Do I need HAF circulatory fans in my greenhouse in New York?

HAF (Horizontal Air Flow) circulatory fans are essential for maintaining consistent temperature and humidity throughout your greenhouse. They reduce microclimates, prevent stagnant air, and minimize the risk of mold or disease. In New York's climate, pairing HAF fans with other ventilation methods like exhaust fans or roll-up sides ensures efficient air distribution. If you have a smaller greenhouse and rely on passive ventilation, HAF fans may not be necessary. However, in larger greenhouses or those using heating or cooling systems, HAF fans optimize airflow and enhance energy efficiency.

What truss spacing is ideal for my greenhouse in New York?

4ft spacing is best for areas with high snow loads or heavy winds. The closer spacing provides greater structural support and prevents frame sagging under heavy weight. It is the most robust option but increases material and construction costs.

Which greenhouse covering should I choose in New York?

Choose the greenhouse covering that makes the most sense for your goals and budget, here is a breakdown of the three main options.

6 mil Greenhouse Film:6 mil film is lightweight, cost-effective, and suitable covering for regions with mild weather and minimal wind or snow. It works well for seasonal growing, short-term applications, or used as a secondary inflation layer underneath a 9mil woven covering. 6 mil is more prone to tearing under high winds or snow load and may need frequent replacement.

9 mil Woven Plastic: 9 mil woven plastic is a heavy-duty option designed for long-term use in areas with high winds, heavy rain, or snow. The woven fibers hold up better under challenging conditions and are more durable tear resistant than standard 6mil greenhouse film.

Twin-Wall Polycarbonate:Twin-wall polycarbonate is the most durable option, offering excellent insulation and light diffusion. It is ideal for regions with extreme weather, such as heavy snow, high winds, or hail. Its rigid structure withstands high impacts and has a longer lifespan than plastic films, guaranteed for 15 years! Twin-wall polycarbonate is highly recommended for permanent or high-performance greenhouse installations.

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Greenhouse Considerations for New York

Bullet Point Title 1

Bullet point explanation one sentence:

  • internal roll to peak system
  • programmable automated light dep system with drive
  • heavy duty woven greenhouse membranes clear & black
  • greenhouse film fastening system

Bullet Point Title 2

Bullet point explanation one sentence:

  • internal roll to peak system
  • programmable automated light dep system with drive
  • heavy duty woven greenhouse membranes clear & black
  • greenhouse film fastening system

Recommended Features for New York

Galvanized Steel End Walls

We use 2” square tubing for our end wall framing kits. The kit includes the uprights and horizontal wall pieces required for supports and rough openings, and installation hardware such as brackets and screws.

Truss Spacing: Standard 5ft

5ft truss spacing is suitable for moderate snow and wind loads and common in temperate climates. The choice between 4ft, 5ft, or 6ft truss spacing depends on your local climate, with 4ft spacing being ideal for heavy snow areas and 6ft spacing for milder regions.

Sidewall Height: Standard 6ft

All greenhouses come with a 6ft sidewall unless quoted otherwise. Other options include 4ft and 8ft sidewall.

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