Hydrangea in June: care at peak flowering time

TL;DR

Hydrangeas reach peak flowering in June. They want plenty of water (daily), shade or part-shade, and acidic soil for blue colour. Do not remove spent flowers: they keep them for structure. They grow 150+ cm, so support helps.

See how it looks

How does your hydrangea look in June? Upload your front yard to [gardenworld.app](https://gardenworld.app) and see within 1 minute how your hydrangeas fit perfectly into your garden design. Tall, full, shade-loving: plan them well.

Why June is peak season for Hydrangeas

Hydrangeas have a long growth cycle. They set buds in August of last year, sleep through winter, and break out in May. June is then their first full flowering month. Hydrangea macrophylla (large-leaved hydrangea) flowers heavily in June, sometimes more in July. Hydrangea paniculata (white panicles) and Hydrangea arborescens (white balls) peak later (July-September), but many macrophylla types peak now.

Hydrangea flowering is also inverse: the more water, the better they bloom. Many garden mistakes happen here: people give "normal" water, and hydrangea becomes limp, wilts. June demands lots of water.

Colour shift happens now too: blue hydrangeas in acidic soil (pH 5-6) stay blue. In neutral soil (pH 7) they become purple/pink. In very alkaline soil (pH 8+) they become pink/white. June is thus good time to fix your colour.

June water needs: plenty, not little

Hydrangea macrophylla want lots of water. Much more than you think.

Minimum in June: 1-2 litres per plant per day (small specimen). Large specimen (100+ cm): 3-5 litres daily.

This sounds like a lot, but makes sense: hydrangea flowers are full of water-filled cells, large flower balls evaporate much water themselves. They grow in shade (less sunny), so water evaporates less, but they still want plenty.

Practice: Check soil daily in June. Feels dry 5 cm deep? Water. Day after day in June may require daily. Too dry equals wilting flowers, leaf drop, no bud set next year.

Water in morning before 8am. Give water straight to soil, not leaves (fungus risk).

Staking hydrangeas in June

Hydrangea macrophylla grows 150-200 cm tall. With heavy flower balls on top they can droop in wind or heavy rain. Stems can snap.

Practice: By May, before full bloom, set stakes. In June: tie gently with rope or raffia around main stem, not tight (circulation must flow).

Some people plant hydrangeas against wall or fence: that helps as support.

Colour control in June

Blue hydrangea: Acidic soil (pH 5-5.5) + aluminium-available. In June if flower blooms blue, good pH. If it blooms pink/purple while you want blue, soil too alkaline.

Remedy: Add ammonium sulphate: 30-50 grams per plant in May-June, repeated every 2 weeks. This lowers pH and supplies aluminium.

Pink/purple and white need no remedy: those are natural colours in their pH range.

Do not remove flowers (don't rush)

Many gardeners cut spent hydrangea flowers in June. This is wrong.

Hydrangeas keep their flowers standing even after they fade. The flower turns purple/brown instead of falling off. They add structure to the plant through autumn. Next spring new growth emerges from them.

Keep flowers: Do NOT cut spent flowers in June. Leave them until March next year. Then they become blue/grey and look attractive in autumn.

Careful cutting: Only if flower is completely rotten/black, cut. Still carefully: do not cut whole stem, just flower base.

Shade and part-shade

Hydrangea macrophylla grows poorly in full sun. They want morning sun (until 11am), then shade. Or dappled shade all day.

June sun is already strong. In full sun hydrangea can burn: leaves turn white/yellow, fade. In shade it blooms better, longer.

Practice: Check your hydrangea location. Full sun more than 12 hours? Shade it with tree/hedge. Part-shade (6-8 hours) is ideal for June.

June diseases

Fungal issues (grey mould, powdery mildew): In humid, poor-air conditions, fungus chance rises. Ensure air circulation: do not crowd, do not over-harvest leaves.

Leaf fungus (spots): Brown/yellow spots on leaf equals fungus. Remove infected leaf. Water to soil, not leaves. In serious cases: broad-spectrum fungicide.

Pest damage (grasshoppers, caterpillars): In June sometimes larvae/hoppers. They make holes in leaves. Usually acceptable, but in large numbers: hand-pick or spray (natural product).

Step-by-step hydrangea June care

Step 1: Check water need daily

First week of June: check soil moisture daily (5 cm deep). Dry = water. Learn this quickly.

Step 2: Give plenty of water

Minimum 1-2 litres per small plant, more per large. Water deeply so root zone is soaked. Morning watering.

Step 3: Set stakes

Large hydrangeas with heavy flower balls: place bamboo stake or thin wooden rod beside plant. Tie gently with rope.

Step 4: Check colour

Blue hydrangea? Look at flower: if pink/purple instead of blue, adjust pH. Add ammonium sulphate (from May).

Step 5: Check for disease

Around mid-June, look at leaves. Yellow/spots equals fungus. Holes equal pest damage. Note what you see.

Frequently asked questions

Can I cut hydrangea flowers now for vases?

Yes, carefully. Cut in early morning (before sun). Cut just under flower base, not deep into stem (leaves there). Put cut flower immediately in water. They last a week in vase. Do not cut too much (plant needs energy for growth).

My hydrangea is turning yellow. Disease?

Probably water shortage. Yellow leaf equals thirsty. Water. If yellow leaves are whole (no spots), water shortage. If yellow plus brown spots, fungus. And ensure drainage under pot (roots must not stand in water).

My blue hydrangea turned pink. Why?

Soil pH too high (alkaline). Hydrangeas take blue-colour aluminium only in acidic soil (pH 5-5.5). At pH 7+ you get pink. Add ammonium sulphate ("blue toner"): 30-50 grams per plant, repeat every 2 weeks May-June.

Hydrangea flower is falling apart. Rotting?

Normal. Hydrangea flowers do not rot quickly. They turn brown/greyish, open parts fall off. This is natural aging. Leave flower until March next year.

Can I harvest hydrangeas now for dried flowers?

Yes! June is perfect time. Cut flower while it still has full colour (not completely faded). Hang upside-down in dry, dark spot (attic, shed). In 4 weeks dried and lasts 1+ year.

Plan your hydrangea garden

Upload your front yard to [gardenworld.app](https://gardenworld.app) and see how your hydrangeas fit perfectly into a shade border with other water-loving plants. Plan colour scheme (blue, pink, white mix), growth space and surrounding greenery.