Mango is the single best return on space in a warm-climate yard, but variety choice matters more than anything you will do afterwards.
Start with size, not flavour
A seedling mango becomes a forty-foot tree. A grafted dwarf stays under twelve feet and fruits in three years. Unless you have acreage, buy grafted and buy dwarf.
The four worth planting here
Glenn is the beginner's mango: mild, sweet, fibreless, reliable, and more resistant to anthracnose than most. If you are planting one mango, plant Glenn.
Carrie has a much richer, resinous flavour that inspires real loyalty. It is naturally dwarf. It is also more prone to anthracnose in a wet spring, so give it airflow.
Pickering is the container mango. Dense, bushy, genuinely small, and happy in a twenty-gallon pot you can move under cover on a freeze night.
Cogshall takes hard pruning better than any of them, which makes it the choice when you intend to keep a tree deliberately small for years.
Anthracnose is the real enemy
Not cold. The fungal disease that blackens flowers and spots fruit in wet weather costs more Florida mango crops than frost does. Airflow, avoiding overhead irrigation during bloom, and cleaning up fallen debris matter more than spraying.