I had heard that grafting onto a dwarfing rootstock could limit the size of the fig for a greenhouse. But I am new to figs. I understand the technique is to tip prune them in June to stimulate fruit formation. Then reduce excessive growth to further focus on fruiting. Not enough experience with them yet. When do you prune half the growth off for brebas, late summer?
I have the greenhouse back wall in this canopy plan Very dense with Figs as the tallest, Grapes mid level, and citrus lower level(shaded in summer).
I am 9 years in tropical Horticulture and the last 3 years (not so far from you!) in Germany climate so I kind of have started over with plant skills and research.
The second greenhouse, The IBC tanks are stacked 2 high, 5 in a row currently outside (I have considered moving them to the inside) the barn which has a south facing wall. just has strong winds there.
The roof angle is basically the same game as for solar panel alignment imo. About 45° I’d say. You can aim for more steep but then the structure changes into a south wall or bent roof.
Solar angle for here is Winter16° Spring/Autumn 39° Summer 62°
My first Greenhouse is a bit too steep leaning into summer angles but it wasn’t an issue for the tomatoes or other plants and last summer was pretty hot.
I like the cheap Chinese designs but I think the wind here would destroy the foliar and i have existing buildings to utilize and these are mostly for fun / personal fruit supply.
I did not predict the condensation run down, I will improve that and the roof angle on the second greenhouse. It would be fun to make it in ground also but I am not sure if I will because of the retaining walls and more work needed, I think with ventilation cooling is enough and for what I would grow safely anyhow should be hardy enough.
Mostly I just want to get to zone 7-9 inside the greenhouse for the figs, citrus and grapes. I don’t know of anything that really inspires me until i maintain above freezing for pouteria, jaboticaba, starfruit, miracle fruit… but then i can also just vacation to my tropical property with tons of that plus jackfruit, marang, bananas, etc.
I find it also interesting how much a greenhouse can be auto irrigated/ventilated without electricity in the even I am gone for a winter and people don’t manage it. I think gas pressured air valves and rainwater overflow into drip irrigation or a larger drainage pipe delivering flood irrigation to avoid clogging issues.
Another aspect is the glazing used. I used triple wall polycarbonate which reduces the sun penetration so a more flat angle can be more acceptable and better temperature retaining ability.
What are you guys thinking to grow if you keep it warmer in a sunken greenhouse?