I have several Dahlia tubers that I saved from 2018. they did not bloom this year. do you have any idea why? They get several hours
of sun, and I water them almost every day, and I gave them plant food.
Certified GKH Gardening Expert
There are several reasons why they might not bloom. This article will offer some insight: https://www.gardeningknowhow.com/ornamental/bulbs/dahlia/no-flowers-on-dahlia-plants.htm
This article will go over the general care requirements: https://www.gardeningknowhow.com/ornamental/bulbs/dahlia/dahlia-care-grow-dahlia-plant.htm