What are the considerations for growing over the summer?

Ventilation, excess heat, making sure roll up sides are critter proof

One of the critically important things that each gardener/grower needs to know is the temperature threshold of each plant.

This is the temperature at which a plant will stop growing and an even higher temperature at which a plant will die.

When a plant has passed the threshold where it stops growing, it will take some time to recover and start growing again.

This is why proper ventilation is so vitally important. On a sunny day, proper ventilation is defined as one air change per minute. You must know the volume of air in your greenhouse and have your ventilation method capable of moving that much air.

A forced ventilation system is the simplest to set up and control since it is thermostatically controlled. The up front and operating cost are significant. Each exhaust fan has a cubic feet per minute (cfm) rating which must be equal or greater than the air volume of the building. A forced ventilation system also has a motorized louvre which will open each time the fan turns on.

On a shorter structure that is facing into the wind, there is the option of ventilating through the doors and windows. This is an economical system but the hardest to control.

Adding roll up sides to a structure has the capacity of moving a lot of air as long as there is air movement around the greenhouse.

This is why it is a good idea to install a window as high on each end as possible. Since warm air rises, this will create a “chimney” effect on a calm day. The down side of roll up sides is the potential for draft across the floor and the fact that you have to be there to open and close the system. You may need to put up mesh to deter uninvited guests.

In addition to changing the air in the greenhouse, it is also important to circulate the air horizontally. Stagnant air pockets invite disease problems. There is not a prescribed rate to move the air, it is just important to keep it moving.

A proper watering system would not be considered as a part of making a greenhouse more efficient but it must be remembered that a greenhouse will increase the water needs of all of the plants.

A final consideration for growing over the summer is the potential need for shade. Most vegetables are good for full sun, all the time, but it is important to remember that this does not apply to all plants.

Wishing you a productive growing season!

We hope you are finding value in this series of posts, helping you prepare for your new growing adventure! Reminder that the deadline is May 31st for Fall Delivery. We look forward to working with you for your projects!

Season Extension: Ventilating & Heating

To make your greenhouse more of a year round functioning entity, there are two main areas in which you have to make the structure more efficient-Heating and Ventilation.

1. Heating is your biggest expense for the winter so retaining heat is a priority.

The easiest way to retain heat in your greenhouse is to install a double poly cover with air in between. A small squirrel cage blower attached to the inside layer of plastic aids in maintaining air between layers.

The more dead air space between these layers you can create, the closer you will be to achieving a 30% reduction in heat loss. Holes will result in air movement and therefore less efficiency. 3″-5″ consistent space is ideal. It is a given that you would have less then that around the edges and over the ridge.

Double plastic will have a considerably longer life span. It is important to realize that as plastic gets older, the light transmission will be reduced which will reduce production.

Infrared plastic (IR poly) does further reduce heat loss and increase light diffusion so it can also be a consideration when looking for ways to reduce heating costs.

2. Ventilation is also one of your biggest considerations for the warmer times of the year. Ventilation can be done through forced or mechanical methods or passive through vents or roll up sides.

Vents are extremely effective since they can be placed higher up where the heat needs to be expelled. Mechanical ventilation is more costly both up front and to operate but it is easier to control since it is attached to a thermostat. For mechanical ventilation to be effective, it needs to be sized and located properly.

Roll up sides are less costly and simpler to install but are restricted by the fact that you have to be there to open and to close.

Climate control is especially challenging in the spring and the fall since most days you will have the need for both ventilating and heating.

One area that you need to be especially aware of is stagnant air. Without proper air movement, circulation and exchanging, stagnant air can cause many different types of diseases. It is important to understand what your plants require

Stay tuned for the third and final installment of our series about Season Extension and Your Greenhouse coming soon!

Coffee Time with Norm: Starting Soon!

Our weekly meet and greet chat is happening again this week, (STARTING in 15 min!) and we hope every week Wednesdays at 9am EST. We hope you can join us!

Today Norm will be covering Ventilation, and time permitting anchoring as well. You will be recorded if you join, but can choose to disable your camera if you are not comfortable having the recording posted on social media.

Join Zoom Meeting
https://us02web.zoom.us/j/83325248870?pwd=WkxKakRDakg4SzIyUVMzTlR2YXErQT09
Meeting ID: 833 2524 8870
Passcode: 5WBcJw

Join us online every Wednesday morning on Zoom to connect, chat, and find solutions to challenges you may have.
Since we aren’t able to get out to trade shows this year, we decided to host this quick weekly check in to connect and say hello!
Norm will be available to answer any questions you may have. You may also send them in advance to multisheltersales@gmail.com and we will answer them “live” on zoom.
We know you’re busy with your business too, so if you send in a question and can’t make it live, don’t worry, we will post a recording on Facebook and YouTube after the event.
Come out and connect, no matter which side of the country you’re on! this allows us to see everyone face to face that we may not normally get to because of distance. we look forward to having you join us in our new weekly special event.
Please note this is a time for connection, brainstorming solutions to your challenges, learning some information about structures and other questions. If you have a question about an order, or would like a quote, please contact the office separately and we would be happy to help you.
We are excited to have you join us for this new event and we look forward to your questions!
Join Zoom Meeting
https://us02web.zoom.us/j/83325248870?pwd=WkxKakRDakg4SzIyUVMzTlR2YXErQT09
Meeting ID: 833 2524 8870
Passcode: 5WBcJw
Coffee Time with Norm Videos

Season Extension: Ventilation & Heating

To make your greenhouse more of a year round functioning entity, there are two main areas in which you have to make the structure more efficient-Heating and Ventilation.

1. Heating is your biggest expense for the winter so retaining heat is a priority.

The easiest way to retain heat in your greenhouse is to install a double poly cover with air in between. A small squirrel cage blower attached to the inside layer of plastic aids in maintaining air between layers.

The more dead air space between these layers you can create, the closer you will be to achieving a 30% reduction in heat loss. Holes will result in air movement and therefore less efficiency. 3″-5″ consistent space is ideal. It is a given that you would have less then that around the edges and over the ridge.

Double plastic will have a considerably longer life span. It is important to realize that as plastic gets older, the light transmission will be reduced which will reduce production.

Infrared plastic (IR poly) does further reduce heat loss and increase light diffusion so it can also be a consideration when looking for ways to reduce heating costs.

2. Ventilation is also one of your biggest considerations for the warmer times of the year. Ventilation can be done through forced or mechanical methods or passive through vents or roll up sides.

Vents are extremely effective since they can be placed higher up where the heat needs to be expelled. Mechanical ventilation is more costly both up front and to operate but it is easier to control since it is attached to a thermostat. For mechanical ventilation to be effective, it needs to be sized and located properly.

Roll up sides are less costly and simpler to install but are restricted by the fact that you have to be there to open and to close.

Climate control is especially challenging in the spring and the fall since most days you will have the need for both ventilating and heating.

One area that you need to be especially aware of is stagnant air. Without proper air movement, circulation and exchanging, stagnant air can cause many different types of diseases. It is important to understand what your plants require

Check out Norm’s overview of Forced Ventilation in this weeks Coffee Time with Norm chat

Featured Add-On Roll Up Sides Q&A *Videos*

We made some tutorial videos regarding our roll up sides options. Please enjoy and let us know any comments you may have. You can also watch them all on our YouTube channel here: https://www.youtube.com/playlist?list=PLBUPJhbi2DLs0UYSo0FRwwi0pMo51PV80

As always, we are available for any questions that come up, so feel free to email multisheltersales@gmail.com or call our office 1-866-838-6729 Thanks!

You can also see more at our Roll Up Sidewall Considerations article (also below videos)

 

Roll up Sides Q&A *revised*

We have had many questions recently about our roll up sides so we made some tutorial videos. Please enjoy and let us know any comments you may have. You can also watch them all on our YouTube channel here: https://www.youtube.com/playlist?list=PLBUPJhbi2DLs0UYSo0FRwwi0pMo51PV80

As always, we are available for any questions that come up, so feel free to email multisheltersales@gmail.com or call our office 1-866-838-6729 Thanks!

*edit* we apologize the links on the last post didn’t work, they have been fixed