Bottom Plate
All Growing Dome® greenhouse kits come standard with a pressure treated Bottom Plate. We avoided pressure treated lumber for quite some time due to our customers' concerns about chemically treated wood. However, the treated lumber is covered with sheet metal on the inside, and fiber-cement siding on the outside. The geodesic dome then sits on a ring of washed gravel, which drains the moisture away, so the pressure treated portion does not come in contact with the soil. The pressure treated lumber plate lasts significantly longer than other options we have tested.

Your building department may require the pressure treated Bottom Plate, being it is termite resistant. Please, do check with your local building department before upgrading to Redwood.

The alternative to pressure treated Bottom Plate is the Redwood Bottom Plate, costs to upgrade to redwood are below.

Upgrade to Redwood:
Dome Size: 12’ 15’ 18’ 22’ 26’ 33’ 42’&51'
Upgrade Cost:$60 $80 $80 $100 120 160 TBD

HardiPanel™
Fiber Cement Siding is now standard!
We are now using fiber cement siding in leui of the
T1-11 siding that was used in the past, at no extra cost to the you.

 

Metal Glazing Strips Upgrade
Our custom designed aluminum trim strips are applied to the outside of the Growing Dome® covering the joint sealing tape which extends the life of the tape. Enquire for upgrade prices for new domes and maintenance kits for existing domes.

 

Solar Cooling Fan Upgrade
The 26' Growing Dome® is the only kit that includes (1) Solar Cooling Fan Kit, free of charge (a $465 value). We now supply a more energy efficient fan that produces the same airflow as our previous fans. The new fans have many more blades and are still able to work in cloudy conditions. In ultra-cloudy conditions, you may want to consider a power supply in addition to the solar panel.