Hydrangea Growing Guide

Hydrangeas are a hardy flower favourite that add colour, texture and vibrancy to the garden. The flowers are perfect for picking and drying and are widely used in bouquets or own their own in a vase. As hydrangea flowers age the colour fades to reveal wonderful antique shades of lime, rose and copper which make a beautiful feature in vases.

3 steps to planting hydrangeaS

Prepare

Hydrangeas will cope with sun, but the flowers tend to not last as long, and the leaves can turn brown in intensely hot areas. They are a vigorous, hardy plant, and quick to establish. 

Hydrangeas are best planted in spring and autumn and provide a stunning show over summer.

Some favourite varieties include Climbing, Lacecap varieties, Mopheads, Oak-leafed Hydrangea and Grandiflora.

Like building a house a good foundation is the key to success in your garden. The better the soil, the better your hydrangeas will grow. Hydrangeas enjoy a well-worked, fertile soil and prefer a shady spot in the garden. If you are starting with an existing garden bed dig in organic matter like Tui Sheep Pellets and Tui Compost to your soil. Then you can add a layer of Tui Flower Mix.

Plant

The best times to plant are early in the morning or late in the day, so the plants aren’t exposed to the hot sun straight away. Always water plants well before and after planting.

Directions for planting in garden beds

  • Water plants thoroughly before planting and allow to drain.
  • Dig a hole, approximately twice the depth and width of the root ball of your plant.
  • Gently loosen the root ball of your plant and position the plant in the centre of the hole.
  • Fill in with Tui Flower Mix.
  • Press soil gently around the base of the plant.
  • Water your plant well and continue to water regularly.

Directions for potting plants

  • Water plants thoroughly before potting and allow to drain.
  • Half fill your container with Tui Flower Mix.
  • Gently take the plant from the current container, loosen the root ball and remove any loose or dead pant material and roots.
  • Position the plant in the centre of the new container and fill with Tui Flower Mix up to 3cm from the top.
  • Gently firm mix around the base of the plant. The mix should be at the same level on the plant as it was in the previous container.
  • Water your plant well and continue to water regularly.

Nourish

Feed your plants and they will feed you. Plants use nutrients from the soil as they grow, so replenishing the nutrients ensures your plants grow to their full potential. Feed your Hydrangeas with Tui NovaTec® Premium Fertiliser in autumn and spring.

A well watered, well nourished garden will have a better chance of keeping insect pests and diseases at bay. While your Hydrangeas are growing regularly apply a dose of Tui Organic Seaweed Plant Tonic to give them a welcome boost.

Hydrangea colours can change with different soil fertility. Flower colour can be altered easily but adding either Tui Lime to enhance red or pink flowers, or Tui Hydrangea Blue to deepen blue tones. Changes should appear within a few weeks.

Prune back to reduce the plant by at least half in autumn, cutting to just above a pair of leaves. Don’t leave it until after the winter, as it will limit flowering for the following season.