Dahlia ‘Knockout’ is a dahlia that presents flowers in shades of yellow.
This dahalia can grow 50cm - 1.5m tall and 50cm - 1.5m wide.
In this growing guide we'll learn the cultivation details and how to plant Dahlia ‘Knockout’.
Plant profileCommon name: dahlia 'Knockout'
Scientific name: Dahlia 'Knockout'
Plant type: Bedding, Perennials
Height: 50cm - 1.5m
Spread: 50cm - 1.5m
Sunlight: Full Sun
Soil: Clay, Loam, Sand
Moisture: Moist but well drained, Well drained
Garden type: Architectural, City & Courtyard Gardens, Informal Garden, Patio & Container Garden
Planting type: Cut Flowers, Flower borders and bedding, Wall-side Borders
Other characteristics: Drought resistant, Plants for pollinators, RHS Award of Garden Merit
Dahlia ‘Knockout’ is from the Single group of dahlias. The flowers of this type of dahlia usually have 8 to 10 wide petals around an open central disc. Know all the dahlia types.
How to plant Dahlia ‘Knockout’
Dahlia ‘Knockout’, like all dahlias, appreciates fertile soil with good drainage. They like to be planted in full sun and fed regularly to produce abundant flowers.
Stake and support the stems of the taller varieties or varieties with large, heavy flowers.
Dahlias do not like strong winds or that the soil remains moist and cold.
The tubers must be lifted off the ground or protected with mulch if temperatures in the area remain below zero for many days in winter.
If you pick the flowers regularly or deadhead flowers that start to wither, the plants will respond by producing more flowers.