i have not seen any "fruit salad" trees sold at the nurseries. there are the Houston Garden centers all over. if you go when they're having sales you can pick up some for over half off. this past fall they had citrus for half off, my dad and i each bought a different orange tree for $20 each. if you are towards the south, there is Joseph's nursery down in Pearland. i bought a couple of mango trees last spring. there's a few around the west side. right off I-10 Katy fwy south Dairy Ashford is Cornelius. and they have another over at Voss just north of Westhiemer. over on the NW side at the NW corner of hwy 249 and beltway 8 is RCW, i bought a lemon and 2 orange trees from them two years ago. as far as ordering plants, they cannot ship citrus into Texas. but other fruit trees should be ok. of the fruits you mentioned, i have not had great success with apples and certain plums. citrus and peaches have been good. i have not personally grown mulberry, but have had neighbors in the past that have had them and they do very well. they do attract a lot of caterpillars.

Some form of nitrogen will generally help trees in average soil establish more quickly, but a quarter pound of actual N. for a small tree could be damaging to the tender roots, I'm guessing. However, I am not speaking from the experience of this particular mistake- I have only damaged more sensitive plants with surface applications of excessive N- never fruit trees. Depends in part on texture of soil, in sandy soil your are more likely to scorch the roots- especially if the tree isn't mulched. Heavy watering can leach out the fertilizer in a hurry.

There are a bunch of places - Outside West Chester, I would go to the place where 162 and Strasburg Road meet - Distinctive Gardens - they have a really nice selection. Also there is a place near Shady Maple that has a Ton of trees - Conestoga Nursery. I think Longwood gets their trees from here. http://www.sas.upenn.edu/~dailey/byfg.html These folks would know, too! Enjoy! But you might want to wait until fall to plant them, with the cicadas coming and all.... (sigh)

How about first telling us where you are seeing how the plant is too big to survive the mail.