Are you sure it's an apple tree first of all? If it is small then try watering it. It might not have matured yet. Most apple trees also need a second pollinator apple tree. I try to keep the small spindly branches pruned, as well as any dead material. Honestly, I don't try that hard. My apple trees have been here for decades. You might need to spray in case of blight/disease. Your growing zone might not be conducive to growing apple trees, depending on your location. Check that here:
http://planthardiness.ars.usda.gov/PHZMWeb/
If all else fails contact your local County Extension. These are the Ag department's local offices, usually run through state Ag schools i.e Texas Tech, Texas A&M, Purdue etc. They should be able to assist you. Find that here:
http://www.csrees.usda.gov/Extension/index.html
Throwing some pics up here would help, but I would contact your Extension for reliability.
http://planthardiness.ars.usda.gov/PHZMWeb/
If all else fails contact your local County Extension. These are the Ag department's local offices, usually run through state Ag schools i.e Texas Tech, Texas A&M, Purdue etc. They should be able to assist you. Find that here:
http://www.csrees.usda.gov/Extension/index.html
Throwing some pics up here would help, but I would contact your Extension for reliability.