Q.Why Do My Patio Apple Trees Have No Blossoms Only Leaves
Trees are 3 years old
Certified GKH Gardening Expert
It could be too much nitrogen or not enough light. Are they under an overhang or getting full sun? They also need the proper pH for the type of apple you are growing. And some varieties take years to mature. Here are general growing tips that should help. We should have an article on the type of apple you have. Just search https://www.gardeningknowhow.com for your apple variety.
https://www.gardeningknowhow.com/edible/fruits/apples/chill-hours-for-apple-trees.htm
https://www.gardeningknowhow.com/edible/fruits/apples/apple-tree-feeding.htm
https://www.gardeningknowhow.com/edible/fruits/apples/pruning-apple-trees.htm
https://www.gardeningknowhow.com/edible/fruits/apples/no-fruit-on-apple-trees.htm