We have finally built the greenhouse for the seedlings from our nursery so they can spend the winter calentitas!
We are in a desert climate zone, so that the amplitude of temperature between day and night is quite large, and not only that, but the night temperature tends to be very low, causing frost. This situation is more pronounced in the botanical garden, as it is in a lower part of the valley, seriously affecting seedlings from the nursery.
In the nursery we germinated seeds that were collected during the past year for revegetation and regeneration of the area, and used as resources, such as carob. The seedlings that will be moved to the greenhouse are: albaida and albaidilla, genista, retama, black hawthorn and carob tree. Carob is the plant most affected by frost. The temperatures below 5 ° C can cause tree death, by the interruption of the flow of sap. Due to these reasons, we have built the greenhouse in the botanical garden, next to the nursery, in a sunny spot.
First, we have taken measurements of a similar structure from one of the gardens and adapted them to the space we have in the botanical garden. We dug a hole in each corner where the arches were placed and filled with gravel to support the structure, which once placed were covered with plaster and soil. The structure has been made with reed (peeled and cleaned) using a very simple technique: two bunches of about seven reeds are joined together to make the main arches, adding reinforcements in the area of attachment. These are carefully placed with the ends in each opposite hole (not across!) clutching the arcs to maintain the position. Two other arcs are placed to and from the bases of the main arches, across this time.
Once the structure is in place, the doors are installed in the center of the main arches and attached to the ground like the arches are held.
Next, a trench is dug around the perimeter of the structure and the plastic cover is placed. This is tensed and is buried in the trench. Finally, the gates are placed and plants, etc are moved in to the inside of the greenhouse, and enjoy!