The system will include two elbows, and the distance of the pipes are all included in the below link.

The name of the tree is "Conocarpus"

I'm not sure how many liters of water does this tree need per week, but we are assuming 100 liters. ( If you know how much it really needs please share)

So, since we assumed 100 liters we are going to divide it by 4 per week. So we want the pump work 4 times per week and each time does not exceed an hour or two (20 liters for each tree for 4 days).

We want to know what is the suitable pump (KW) for our system and what's the equation to calculate it and how to calculate the holes diameter so the water pressure would be good for the last tree at the end of the pipe.

https://postimg.cc/image/u1i5qx7jr/