Hi, I’m a horticultural consultant with a PhD in Plant Protection science and here want to tell you about things that lead the lovely blooms of your indoor Hydrangea to die.
1- Heat Will Cause your Indoor Hydrangea Flowers to Turning Brown
For your indoor hydrangea during flowering, the ideal temperature range is between 60°F and 75°F (15°C to 24°C). This range helps the plant thrive, encourages blooming, and prevents heat stress. It’s also important to keep the plant in a spot with cool nights around 55°F to 60°F (13°C to 15°C), as this can help prolong flowering. Avoid temperatures above 80°F (27°C), which can cause the flowers to brown and the plant to become stressed.
So, your indoor Hydrangeas are sensitive to high temperatures. If they are exposed to too much heat, particularly if they are placed near a heat source like radiators, vents, or in direct sunlight for long periods, the flowers and leaves can become scorched and turn brown.
2- Insufficient Watering Will Cause your Indoor Hydrangea Flowers to Turning Brown
Hydrangeas need a consistent level of moisture. If the soil is too dry, the flowers may start to brown. Hence, too little water leads to dehydration and affects the flowers.
3- Root Rot Will Cause your Indoor Hydrangea Flowers to Turning Brown
Please notice brown or yellow flowerheads can be a sign of root rot. It can be due to overwatering or the pot doesn’t have drainage holes. If you have a heavy hand in watering, you should only water your indoor Hydrangea when several inches of topsoil dries out.
You must check the draining of excess water from the bottom holes of the pot. if your indoor Hydrangea is planted in the pot without drainage holes, read the following posts to prevent root rot.
4- Full Sun Will Cause your Indoor Hydrangea Flowers to Turning Brown
If your indoor Hydrangea is placed in direct sunlight, it is similar to putting it near a heat source, a hot sun will scorch the flowers and dry out and turn brown, especially the edges of the petals. This can make the blooms look unattractive and can shorten their lifespan
5- Blooming Time Is Out
If you are sure about your caring methods, if your indoor hydrangea flowers are fading or turning brown, no need to worry, this is simply a sign that it’s your indoor Hydrangea flowering time is out and you must remove the flowers.
Please notice that your indoor Hydrangea is not a real houseplant (I discussed it in my other post) and cannot last for years inside. In the following posts, I gave you tips for lasting your gift Hydrangea and enjoying its eye-catching blooms for years.
Tips to Prevent Brown Flowers in Indoor Hydrangeas
- Avoid direct sunlight: Place your hydrangea in a spot with bright, indirect light rather than direct sunlight, which can be too harsh.
- Maintain moderate humidity: Use a humidifier, or place the pot on a tray with water and pebbles to increase humidity around the plant. Misting the plant can also help, but avoid over-wetting the flowers themselves.
- Water properly: Keep the soil consistently moist but not waterlogged. Water when the top inch of soil feels dry to the touch.
- Provide proper air circulation: Good airflow helps to prevent fungal issues and reduces heat stress.
- Keep away from heat sources: Avoid placing the plant near radiators, heaters, or air vents.
By maintaining a stable temperature, proper moisture, and indirect light, your indoor hydrangea can thrive and produce beautiful blooms without the browning that comes from heat stress.
The End,
I told you about 5 common things that cause your indoor Hydrangea flowers to turn brown. As a horticultural consultant, when people complain about wilting their Hydrangeas, I always ask them to check whether they are dying or dormant. I discussed it in my other posts.
If you have any problem with your indoor Hydrangea, please ask me in the comments. I will answer them as soon as possible.
Elahe Rabiei
Hi, I’m Elaheh. My Academic major is plant protection, and houseplants are my expertise. As a houseplant lover, my house is full of indoor plants and it is my passion to take care of them. Hence, I’m here to share my knowledge and experience about growing healthy houseplants. I am also a plant protection advisor, so feel free to ask me any questions you may have.