Hydrangeas are perennials and grow best in full sun or partial shade. They prefer moist soil with plenty of organic matter. They do not like dry soil, so they need regular watering. However, if your hydrangea does get too dry it will start wilting and dying off. If you have a pot filled with them they may even rot due to lack of moisture! You want to keep the humidity up around your plants at all times!
The key to hydrangea care is to provide water regularly, but not too much. Water hydrangeas very slowly, so that they don’t overheat and die from overheating. Water hydrangeas need light to photosynthesize which means they need light at night when their leaves are closed down (which is most of the time). A weak plant will wilt under these conditions.
If you live in a hot climate, then you probably already know that hydrangeas are sensitive to heat. When the temperature rises above 90 degrees Fahrenheit, the leaves begin to shrivel and fall off. If you’re lucky enough to have cool summers, then hydrangeas tolerate cooler temperatures better than other plants. But they still suffer from scorching hot days!
It seems like a strange concept that a plant that loves water would not thrive in an area that has high humidity. But the soil in the pot dries out too quickly and prevents it from thriving in high humidity areas.
When it comes to growing hydrangeas, you might as well forget about those little pots that are sold at your local garden center. Those tiny pots dry out too quickly and the roots don’t have enough room to spread out.
If you live in an area that doesn’t have a lot of rain (drought-prone areas), then it might be best to add organic material like peat moss to the soil. This allows the soil to retain more moisture, but don’t overdo this or your hydrangeas will suffer from root rot!
Sources & references used in this article:
Hydrangea: A Southern Tradition by M Browne – walterreeves.com
Heavenly hydrangeas by J Harrison – 2013 – agris.fao.org
Hydrangea Root: Nutritional Health Benefits by G Church – 2001 – Firefly Books
Vase life extension of cut hydrangea (Hydrangea macrophylla) flowers by HR Tea – oawhealth.com
Efficacy of dikegulac sodium applied to pruned and unpruned ‘Limelight’hydrangea grown at two locations in the southeastern United States by S Kazaz, T Kılıç, E Doğan, Ş Sekmen – The Journal of Horticultural …, 2020 – Taylor & Francis
IPM FOR SHRUB PRODUCTION by DR Cochran, A Fulcher, G Bi – HortTechnology, 2013 – journals.ashs.org
The Book of Dried Flowers: A Complete Guide to Growing, Drying and Arranging by GM Eid, N Albatal, S Haddad – International Journal of …, 2015 – aquapublisher.com
Taylor’s guide to growing North America’s favorite plants: proven perennials, annuals, flowering trees, shrubs, & vines for every garden by M Hillier, C Hilton – 1986 – books.google.com