Growing a "Green" Orange Tree

Step 9 Plant the seeds and put it somewhere with a lot of light.

Dig small holes in the soil and put the sprouted seeds in to them (I used a pencil stuck into the dirt to make the hole, but you could use almost anything. Really creative people use their fingers). You want the seed to be about 1/4" under the soil.

I put 3 seeds in each bottle. I intend to let them all grow up a little then pull out the weakest ones to leave 1 strong plant. I'll probably end up replanting the ones I pull out though.
 
Cover the seeds over with soil.

Put the top part of your greenhouse on and set the whole thing in a sunny window. Sometimes I tape the top of the greenhouse to the bottom so it doesn't fall off. Sometimes I don't. 

I water the soil whenever it dries out (about 3 times a month). If the soil dries out too often, I just put the cap on the bottle. That keeps the moisture and heat in, but it needs to be removed for a little while each day so your plant can breathe.