Coffee and Caffeine FAQ

I am growing 400 coffee trees in my greenhouse.
I started by presoaking my seeds.
After aprox. 2 months the seeds started to sprout, it took so long I almost gave up and tossed the seeds thinking they were bad.
I keep the plants above 65 degrees and place outside in the summer. Keep moist but not enough to drown the roots.
Although I started all the seeds at the same time, the plants are of different heights and shade of green with some showing variated leaves.
They have been growing for two years with the tallest reaching 2'.