I tried to grow dahlias in my tiny garden. For some reason all the leaves turned rusty brown, and died off...

Then I started to jank them out - it turns out all the tubes rotted. Or at least I thought it did! Some came back and blessed me with some nice flowers.

How much drainage dahlias need? Or, I guess how much water they need?

First the trivia. The dahlia is named after Swedish 18th-century botanist Anders Dahl. It`s also the official flower of the city of Seattle.

Water established Dahlias thoroughly and deeply once a week. Water more frequently if it's very hot.

If you want your Dahlia to provide a continuous, extended flower show, you will need to remove the spent buds promptly.
The tender new growth of a Dahlia is a favorite food of slugs and snails. Take the necessary precautions to protect your plants from these pests.

For the finest cut flowers, cut them early in the day, when they are first opened. Place them in water which has set for 24 hours to allow any chlorine to dissipate, and change the water daily. Cut Dahlias will last from 5-7 days.