BloomStruck hydrangea: Diseases and Remedies (3-minute Read)

NOTE: In this article, BloomStruck hydrangea and Hydrangea macrophylla’P11HM-11′ may be used interchangeably; in fact, Hydrangea macrophylla’P11HM-11′ is the botanical name for BloomStruck hydrangea.

The BloomStruck® Bigleaf is one of the most popular varieties of hydrangeas. It is disease resistant, has been bred to bloom all summer, and tolerates heat quite well. The bloom color of the bigleaf hydrangea is determined by the soil’s pH level, which can be very acidic or less acidic, depending on the type of hydrangeas.

Careful: it has been noted that BloomStruck hydrangea is poisonous to Humans, Cats, Dogs and Horses.

Why does my Hydrangea macrophylla’P11HM-11′ roots have rot?

Root rot on your BloomStruck hydrangea (Hydrangea macrophylla’P11HM-11′) can be fatal if not treated with care. For this reason, we strongly recommend that you follow our guide to keep your plant alive if the symptoms occur: Root soft and blackened.

Why does my BloomStruck hydrangea have gray mold spots?

A particular fungus known as gray mold spots spreads quickly and frequently damages flowers. This fungus is probably to blame if you see any brown (or gray) spots. If you disregard these warning signs, your plant could die.

Our Solution

The solution is quite logical when you know the cause of the problem. Most of the time, it is due to overwater of the Hydrangea macrophylla’P11HM-11′. We advise you to remove the infected parts of the plant, cut off the infected roots and leaves, then repot your plant using sterile potting soil and a clean pot.

Why does my BloomStruck hydrangea have leaf spots?

Leaf This type of disease is one of the most frustrating for BloomStruck hydrangea owners, we give you all the leads to spot and save your plants that present symptoms such as leaves that suddenly change color, or wilt/droop.

Why are my BloomStruck hydrangea leaves turning yellow?

In the world of horticulture, yellowing leaves are undoubtedly the most common problem. The two main causes of this problem are overwatering and a lack of nutrition.

Reduce your watering frequency when you fear your plants are being overwatered, and follow these steps to determine whether they may be lacking in nutrients:

Here are some signs of yellowing caused by the many deficiencies on the Hydrangea macrophylla’P11HM-11′ in question:

  • Yellow patches between leaf veins on elder leaves are the first sign of magnesium shortage. Veins continue to be green while the leaf’s core turns yellow. The leaf’s edges yellow last.
  • Yellowing between leaf veins is another sign of iron shortage, but young leaves on plant tops and branch tips are initially affected.
  • Sulfur deficiency starts with the newest leaves, turning them yellow throughout.
  • Insufficient potassium causes the leaf edges to turn brilliant yellow while the interior of the leaf stays green. Older leaves show the symptoms initially, and the leaf edges quickly darken.
  • A lack of nitrogen is indicated by a widespread yellowing. Older, inner leaves are the first to yellow. As the yellowing progresses, it eventually touches young leaves as well.

Our Solution

According to the symptoms mentioned above, you just have to act accordingly. You can reduce your watering frequency, or fix a deficiency in Potassium, or Nitrogen, for that, you just have to buy a special soil for your deficiency, a consultant in a gardening store will know perfectly well how to inform you.

Is my BloomStruck hydrangea sunburned?

It is quite easy to find out if your BloomStruck hydrangea (Hydrangea macrophylla’P11HM-11′) has been burned by the sun. Just like on us, your plant will change color in this case, it will start to turn yellow or white.


As we saw above, the leaves of your BloomStruck hydrangea can also change color if it receives too much water or insufficient light.

To find out if the yellow leaves have been sunburned, look at the part of the bottom that is tinted closer to the base. The yellow leaf is probably burnt and not something else if this portion stays greener.

Why are my BloomStruck hydrangea leaves turning brown?

The classic sign that a plant has been overexposed to direct sunlight and sunburned is the development of browning leaves. Rest assured that while this may probably save your plant from dying, it will adversely affect its growth.

Should I leave my Hydrangea macrophylla’P11HM-11′ in direct sunlight?

No! Don’t leave your Hydrangea macrophylla’P11HM-11′ (or BloomStruck hydrangea) in the sun if it displays the symptoms mentioned above; that’s why it’s in such a bad situation.

Our Solution

The remedy, as said in the paragraph above, is simple: just move your plant’s BloomStruck hydrangea out of direct sunlight. Your plant should swiftly re-grow with this strategy and appropriate watering.

Why are my Hydrangea macrophylla’P11HM-11′ leaves drooping or wilting ?

This typically occurs when your Hydrangea macrophylla’P11HM-11′ gets dehydrated. Large plants are more at risk since they naturally require more water than smaller plants.


You may quickly determine if your Hydrangea macrophylla’P11HM-11′ plant needs water by under-weighing its pot; if it seems light, the soil and roots are probably fairly dry and require water.

Our Solution

In order to ensure that the roots of your plant receive the water’s benefits, you must first moisten the soil in the container if it is absolutely dry. One common error is to immediately drown the BloomStruck hydrangea after a dry period in the belief that it requires a lot of water.

This is the case, but giving too much water at once is the best way to finish it off, you should actually water the soil normally, resuming a quiet watering rhythm.

Caring Tips for Hydrangea macrophylla’P11HM-11′

Water Occasionally

Water is necessary for your plant to live, but timing and amount of watering must be balanced. Overwatering could have disastrous effects on your own name, as we already mentioned.

The best way to know if your plant needs water or not is to touch the soil, if you feel it is still wet, it is probably a good idea to wait a few more days.

Always keep temperatures stable

Maintaining a consistent temperature for your Hydrangea macrophylla’P11HM-11′ is also a good idea, especially if it is kept indoors. At GreenShack, we typically advise reserving a temperature between 65 and 85 degrees F. Of course, avoid positioning your Hydrangea macrophylla’P11HM-11′ close to air conditioners, radiators, or other sources of hot or cold air.

Keep your BloomStruck hydrangea Dust-Free

This one is about houseplants. Your indoor plants’ leaves get dusty just like your furniture does. The problem is that this might prevent photosynthesis from beginning, which would result in the plants gradually losing their color.

This would also make the pests happy, a real descent into hell for your BloomStruck hydrangea.

Take a microfiber cloth and gently massage the plant’s leaves to get rid of the dust. Use a damp cloth to make dust removal easier, but avoid using corrosive materials like rubbing alcohol!

Keep drainage in mind

If you have a tendency to overwater, you should be mindful of your drainage, and if they don’t already have them, we suggest selecting a saucer and a pot with drainage holes.

If your pots don’t already have holes in them, you can add volcanic rocks (or any other pebbles with holes) to the bottom of your pot in the meantime. This will assist in creating a channel and keep the water from pooling there for an extended period of time, protecting the roots from decay.