I need to cover 600 squared meters of a wall and roof structure with an ornamental, evergreen, perennial, climbing vine. The native species here all have seasonal cycles and after some experiments they all died, even if provided regular water and good soil. Im trying to be very cautious bringing in a foreign species that ends up being very invasive since our land is also a natural reserve containing a very unique ecosystem: tropical dry forest, and don’t want to disturb unnecessarily the protected zone 5.
The roof will have a hemp rope mesh so the climber has a fixed structure to attach to and would be exposed directly to the sun. The average temperature is 28 degrees Celsius and can rise over 45 degrees during the dry seasons. The roof is also now protected by a thick tree wind barrier and as they continue to grow it will be less of an issue.
We considered buganvillia but it’s preferable to avoid thorny plants for maintenance concerns and since the local varieties can grow very thick woody stems in time can put too much weight pressure on the structure.
Online searching led me to Japanese and Boston ivy, they both effectively grow in a bit colder places near us and have a peculiarity that new seeds wouldn’t germinate outside of a fridge. Do you think they could be viable?