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• Method 1 of 2: Make cut hydrangeas live longer
• Method 2 of 2: Care for planted Hydrangeas

Hydrangeas are plants with beautiful flowers that come in all colors and sizes. If you want to keep your hydrangea looking good outdoors, you should definitely prune and water regularly. With cut hydrangea stems you can try dipping the ends in mandrake powder, regularly changing the water in the vase and putting the flowers in lukewarm water.

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Method 1 of 2: Make cut hydrangeas live longer

1. Cut the stems diagonally. Make a deep diagonal cut along the underside of the hydrangea stems. A diagonal cut will minimize damage to the ends of the stems.
   • Cutting the stems under running water will help prevent potentially harmful air bubbles from forming at the bottom of the stem.
2. Dip the hydrangea stems in alum powder after cutting the stems. Place a little bit of alum powder on a plate about 1/2 inch deep. Once the hydrangea stems have been cut, dip each individual stem in the alum powder. Then place the stem in a vase with water and arrange the flowers. This will ensure that the flowers will thrive for a longer period of time.
   • You should be able to find alum powder in the herbal section of the supermarket.
3. Immediately after cutting, place the cut stems in lukewarm water. Once the stems have been cut, place the plants in water as soon as possible.Fill a clean vase with 10 - 15 cm of lukewarm water or water at room temperature.
   • Do not crush the ends of the stem to help keep the hydrangea from drying out.
4. Mist the blood leaves with water once a day. In fact, hydrangeas absorb more water through their blood petals than through their roots and stems. If you want to keep cut hydrangeas looking nice, you should gently mist the petals with water every day to keep them hydrated.
   • Use a spray bottle with limited mist so that the delicate petals are not damaged.
5. Replace the water in the vase daily. Fresh water will keep the hydrangea flowers hydrated and prevent them from wilting too quickly. Remove the cut hydrangeas from the vase and pour away the old water. Refill the vase with fresh water at room temperature.
   • Rinse the vase to remove all grit before adding fresh water.
6. Add ice to the vase if your hydrangeas wilt when exposed to high temperatures. For hydrangeas that are starting to wither, fill the vase with two parts ice and one part water. This will help cool the plants that have been overheated.
   • You should already see improvements after a day. Feel free to keep adding ice / water for several days in an effort to revitalize your hydrangeas.
7. Submerge the bloodheads in warm water when they begin to wilt. If your hydrangea's blossoms start to wilt, you can provide a little support by submerging them in a bowl of warm water for up to 30 minutes.
   • Be careful when lifting the hydrangea back, as the water can make the plant quite heavy.

Method 2 of 2: Care for planted Hydrangeas

1. Plant your hydrangeas so that they are exposed to the sun and protected from the wind. Hydrangeas need full sun to thrive, so plant them in a spot that has either full or partial sun exposure. Your hydrangea should also be planted out of the wind.
   • Wind can dry out your hydrangea plants even further, so make sure they are protected from the wind and hydrated often.
2. Plant hydrangeas in temperate climates. The ideal temperature is around 21 ° C during the day and just below 15.5 ° C at night. If it is warmer than this, the flowers may wither. In colder temperatures, the foliage may be damaged by frost.
   • In the fall, hydrangeas produce flower buds that will bloom the following year. During this period, hydrangeas need a period of six weeks with temperatures below 17.5 ° C for the flower buds to develop.
3. Use standard potting compost or compost to plant your hydrangeas. If you are planting hydrangeas in the ground (rather than in a pot), be sure to add some potting compost or compost to the hole so the plant can get through the transition better. But don't forget that the color of the hydrangea flowers is determined by the pH of the soil.
   • A high number of aluminum ions in the soil will produce blue hydrangea flowers.
   • A pH of 6.0 or more will produce pink flowers.
   • White hydrangea flowers are not affected by the soil pH.
4. Water the hydrangeas every day so that the soil remains moist. Hydrangeas need to stay hydrated to survive, especially during the first few years. If the soil is too dry, the leaves and petals will begin to wither. Try to water your hydrangea plants every day - just enough water to keep the soil moist - and see how it fares. You need to water these plants at least 3 times a week.
   • You can water less if you live in a particularly humid climate, or more if you live in a very dry climate.
   • Try to give more water when the leaves start to wilt. If the plant is starting to look sticky or wet, you may need to water less often.
5. Prune your hydrangea regularly. While it may seem counterproductive to cut off part of the plant to encourage new growth, this is in fact a very common thing. Prune away older stems and shoots that appear wilting or dying.
   • Always cut above a node on the stem.
   • Removing old growth will make way for new growth!
6. Cover the plant with leaves in the fall to protect it from frost. If you want your hydrangeas to survive the winter, it is a good idea to cover them from fall until the time it warms up again. This will protect them from the cold weather and help prevent frost damage. Cover the plant with about 40 cm of bark, pine needles or straw mulch.
   • You can cover the entire plant by making a loose cage out of chicken wire and placing it over the plant. Fill the inside of the cage with leaves and mulch to shield the plant from the cold.
   • Do not use maple leaves for this because they deteriorate too quickly.
7. Prevent mildew by trimming the affected area and spraying it with an anti-fungal agent. Botrytis, also called powdery mildew, is a fungal disease that often affects hydrangea plants. If you see a fuzzy gray spot on your hydrangea plant, cut it off immediately. Cut off and discard the affected area. Then spray your plant with an organic fungicide that will protect the plant from further contamination.
   • Be sure to disinfect your pruning shears with disinfectant between each pruning to prevent fungal spores from spreading.
   • You can use sulfur (liquid spray or wettable powder) as an anti-fungal agent. Just make sure to stop using sulfur once the temperature rises above 26.5 ° C, as sulfur can damage the plant in hot weather.
   • Try to water from the bottom of the branches to prevent the leaves from getting too wet. This will also help prevent mildew.