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Hydrangea macrophylla Black Steel Blue

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A new variety that contrasts traditional flowers over stems which are almost black

This recently introduced hydrangea has shiny black upright stems, which compliment its large mop-head flowers beautifully. The flowers emerge through summer and into autumn, blue or purple, the exact shade depends on your soil - the more lime free your soil, the deeper the shade of blue.

Where?

Happy in a sunny or partly shaded position. Ideal for a cottage garden, in a border or container. It also makes a great cut flower.

How?

Loves growing in a fertile, well-drained, soil. Keep well watered in dry spells. Add lime to encourage pink blooms or aluminium sulphate to produce blue flowers. Use a good quality potting compost for container growing.

Plant details


In depth plant information

Property Value
Plant type Ornamental shrub
Flower colour
Foliage colour
Typically available April - September
Season of interest Summer
Flowering June - October
Evergreen No
Plant height 150 cm - 200 cm
Plant width 190 cm - 250 cm
Fragrant flowers No
Attracts bees Yes
Attracts butterflies Yes
Plant height in 5 years 120 cm
Hardiness zone (?) H3

Will perform best in these conditions

Property Value
Soil type Chalk, Clay, Loam, Sand
Light exposure Part shade, Full sun
Soil drainage Well drained, Medium
Planting instructions

Water the plant in its pot thoroughly before planting – give it a good soaking. Prepare the area by digging a hole twice the size of the pot. Dig compost into the base of the hole. Remove the pot and position the plant in the hole, with the top of the rootball about level with the surrounding soil. Refill the planting hole with a mixture of garden soil and compost, firming as you go. Water in well and keep well watered during the plant's first year.

Planting site Cottage garden, Informal garden, Coastal or drought resistant, City garden, Courtyard garden, Flower border and beds

Typically available

From April to September