If you geld a horse after four will he still be tempermental?

Gelding a horse after the age of four can help reduce certain temperamental behaviors associated with stallion hormones, such as aggression or excessive competitiveness. However, individual temperament is influenced by genetics, training, and environment, so some horses may still exhibit temperamental behaviors post-gelding. While many geldings become more manageable and calm, it may take time and proper training for any behavioral changes to manifest.