How to prune thomas edison dahlia

Pinch tips in late spring; disbud and deadhead through summer; cut back after first autumn frost. Pinch the main stem above the third leaf pair when young. Remove secondary buds around the terminal bud for larger blooms. Deadhead by cutting spent stems to the nearest lateral bud. Cut to 15 cm after frost before lifting.

Disbud and deadhead continuously through the season; annual cut-back at season end. Thomas Edison is a large-flowered ball-type dahlia that benefits from early pinching to develop a strong branching framework. Disbud to one flower per stem for maximum bloom size. Deadhead spent flowers regularly to maintain productivity through summer and into autumn. After frost blackens the foliage, cut stems back and lift tubers for frost-free winter storage.

Pinch the main stem above the third leaf pair when young. Remove secondary buds around the terminal bud for larger blooms. Deadhead by cutting spent stems to the nearest lateral bud. Cut to 15 cm after frost before lifting.