How to water hydrangeas – the simple mistake you might be making when watering your plants

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Hydrangeas are a common flowering plant that grow up to three metres in height. As the name suggests, hydrangeas like to drink plenty of water, but it’s important you’re giving it the right type of water.

Hydrangeas are derived from the Greek phrase ‘water vessel’, owing to their unusual seed capsule shape.

They’re found all over the world, and there are between 70 and 75 different species of the plant in total.

Hydrangeas start to bloom in early spring, and should be approaching their full foliage by the start of June.

But you should consider regularly watering your hydrangeas from late April, to give the flowers the best chance to develop.

A general rule of thumb is to water your hydrangeas at least three times a week.

If you’re struggling to decipher whether to give your plant more water, a simple trick is to look at the leaves.

If the leaves have started to droop, chances are that it needs a good drink.

But don’t forget to use the right type of water, however, as it could be making a big difference to your flowers.

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A common mistake that many people with hydrangeas make is using tap water for watering.

Regular, domestic tap water can often give very hard water – particularly in parts of the southeast of England and the Republic of Ireland.

Hard water can actually transform the colour of your hydrangea flowers, according to the Royal Horticultural Society (RHS).

Instead, you should consider collecting rainwater, wherever possible, and use that to water your hydrangeas, instead.

“Hydrangeas are popular garden shrubs with delicate heads of flowers in shades of pink, white or blue and pretty autumn colour and leaf shape,” it said.

“The mophead and lace-cap hydrangeas are most well-known for their ability to change colour in different soils.

“This colour change is due to the soil pH which affects aluminium availability.

“Try to use rainwater to water hydrangeas, since mains hard water can affect the flower colour, turning blue flowers mauve or pink.”

Don’t forget to also regularly deadhead your hydrangeas, warned the RHS.

It’s crucial to dead-head your hydrangea at the right time of the year.

You can leave the dead heads on your hydrangeas throughout the winter, as they’ll provide some frost protection for the new growths below.

Remove the old flower heads in early spring, cutting back to the stem to the first, strong healthy buds.

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