Here are some pics of different color Mandevillas. I don't think I have ever taken a picture of mine! I will be this year.
This is the color that I plant every year.
Here is a beautiful pic of pink Mandevillas
And here are the crimson Mandevillas
This is what you will need...
Mandevilla of your color choice
trellis (mine came from Hobby Lobby but you can find them at garden centers or nurseries)
potting soil (I used Miracle Gro)
This is what I bought at Wal Mart for $10. It's the Sun Parasol Giant White Mandevilla
This is my trellis, pot, Mandevilla, and potting mix (peat moss not in the pic) that I used
Take the bag of potting soil and dump it into the pot and add peat moss and mix it up. I used about 3 gallon size pots of peat moss. Then add the Mandevilla and carefully place the trellis on top and wrap the vines around it. I watered and fertilized it with Miracle Gro. That's it!
I had some Sweet Potato Vine and Creeping Jenny so I decided to add that to the bottom. It will cascade down the side of the pot. I may add something else to the back. You can leave it as it is. Believe me, when it takes off it is so lush and full it is fine by itself. But I have a problem with leaving well enough alone so I added trailing vines.
And there you have it folks. This took me maybe 15 minutes. I will post more pics when it gets bigger and blooms. Happy Gardening!