By Lisa Emerson, Parent Volunteer
Background
George Washington High School has a wonderful greenhouse that was originally built in the early 1960s, around the time that the school was built. At 1,024 square feet, it is a good size and is attached to the building outside the science rooms in the lower level of the south wing. Hail and age have left the polycarbonate roof with holes, dirt and mold, affecting the light transmission, temperature, and overall growing quality of the space. The temperature is difficult to regulate – it’s too cold in the winter and too warm in the spring, summer and fall. A group of students came together to lay the groundwork to restore the greenhouse, and they have made impressive strides towards bringing the old greenhouse back to life.
Currently, GW students use the greenhouse during the short season that it is functional to start vegetable seeds and transplant seedlings. Some of these seedlings are sold in the annual plant sale, and some are planted in the student plots of the community garden. In the fall, students harvest vegetables for the school cafeteria through the DPS Garden to Cafeteria Program, and for the George Food Pantry to help school families.
Funding
Through hard work and a great application, the students won a $24,750 award through the Climate Champions Grant, offered by Denver Public Schools (DPS) Sustainability Team and Denver’s Office of Climate Action, Sustainability & Resiliency (CASR). Students have also raised approximately $10,000 through plant and veggie sales over the past 6 years. These combined funds are slated to go towards improving the cooling systems and repairing the walls.
Cooling
Upgrading the cooling systems includes adding a MicroCool Fogger system, fans, and vents. The fogger system is a sophisticated evaporative cooling system that will also raise the humidity in the greenhouse, improving the growing environment year-round. The venting solution involves automating an existing side-wall vent that runs the length of the building to open as temperatures warm. This vent, in conjunction with an existing roof vent and fans, will provide excellent passive cooling to the space.
The Greenhouse Committee has received 2 bids from qualified contractors and has found that it needs to raise additional funding to pay for the fogging system. A Colorado Gives Fundraising Campaign has been established for anyone who is interested in supporting this effort. Any amount helps, can the students count on your support? The donation page can be found here.
Walls
The walls require some panel replacement and repair once the old fan units are removed, and new fans are installed. Funding for this work is included in the grant.
Roofing
Luckily, DPS will replace the roof through an insurance claim, and the Greenhouse Committee is hoping to upgrade the glazing to a more durable material. The current roof is polycarbonate, a material that becomes brittle with UV exposure, and is susceptible to hail damage, increasingly with age. Through research and talking to greenhouse consultants, they have found a material called ETFE that is much more durable with UV exposure, is said to withstand 2” hail and should be compatible with the existing roof frame. The committee is hopeful that this new material can be used as a longer-term alternative to polycarbonate. They are now in the process of getting the ETFE solution approved through DPS.
The Future of the Greenhouse
The Greenhouse Committee is excited to restore the greenhouse to make it functional throughout the school year. As a functional greenhouse, students and teachers will be able to use the space for classes, special projects and clubs, exploring many topics including biology, botany, life cycle, agriculture, health and wellness, horticulture, history, cooking and more. A restored greenhouse also enables students to expand what they are already doing – to produce food for the cafeteria and to provide fresh produce to the George Food Pantry year-round.
Join Us!
The Greenhouse Committee welcomes new students who are interested in helping with this effort, and encourages interested students to reach out to co-leaders Abby Wenig at [email protected] or Graeme Elson at [email protected]. Meetings are held every Thursday morning at 8:45 in Room 030. Please contact Lisa Emerson at [email protected] if you have any questions or would like to get involved in this project.
Check us out on Instagram at https://www.instagram.com/gwhsgreenhouse/