Dahlia 'Joyful Investment' (Col) — Bushy, clump-forming, tuberous perennial

Overview

Dahlia 'Joyful Investment' (Col) is a bushy, clump-forming, tuberous perennial bedding in the genus Dahlia, part of the Asteraceae family, with green, occasionally dark-leaved foliage. Dahlia 'Joyful Investment' (Col) grows best in full sun, and tolerates loam soils and neutral pH. Its UK hardiness is rated H4. Suggested uses include borders, containers and cut flowers.

About

Dahlia 'Joyful Investment' is a clump-forming, tuberous herbaceous perennial that flowers from July to October. It has green foliage that can appear darker on some plants and performs best in full sun on loam soil. Plant on a south-facing, sheltered spot and allow soil to remain moist but well drained. Rated H4 (average UK hardiness), it is suited to borders, containers and cutting for the vase.

About the genus

Dahlias come from the high meadows of Mexico, and somewhere in that heritage is the explanation for how they behave here: tender to frost, hungry, generous beyond all reason. No other plant gives you quite so much for so little. One tuber, planted after the last frost, becomes a shrub's worth of flowers by August — and the more you cut, the more they come.The range is faintly ridiculous. Tight pompoms, spiky cactus types, singles the bees adore, dinner-plates the size of your face. Whatever your garden's mood, there is a dahlia that agrees with it, which is probably why every generation falls out of love with them and then, a decade later, falls straight back in.They're at their best when much of the garden is winding down — late summer into autumn, flowering hard until the first frost calls time. I think of them as the encore. And they always play it.

Written by Henry

In the garden

A member of the genus Dahlia in the family Asteraceae, Dahlia 'Joyful Investment' is a clump-forming, tuberous herbaceous perennial grown for an extended summer–autumn display. The cultivar carries green foliage that is occasionally darker on certain plants and produces flowers over a long season from July to October. Give it a sunny, south-facing position with shelter from the coldest exposure; full sun suits flower production. It prefers loam of neutral pH and a soil that stays moist but drains freely—avoid heavy, waterlogged sites. The H4 rating indicates average winter hardiness across the UK, so place where the roots are protected and the aspect reduces exposure to driving winds. Useful as bedding or planted in large containers, Dahlia 'Joyful Investment' lifts a border with continuous summer colour and supplies reliable stems for cutting. Allow room for the clump to develop and position where the flowers can be seen from paths or windows to get the most value from its July to October flowering period.