

















Great Rhododendron
Also known as
Great Laurel, Great Laurel, Rosebay rhododendron, Great rhododendron, American rhododendron and Big rhododendron
Taxonomy
Rhododendron maximum
Rhododendron
Ericaceae
Ericales

How to care for Great Rhododendron

How often to water your Great Rhododendron

every 9
Great Rhododendron needs 0.5 cups of water every 9 when it doesn’t get direct sunlight and is potted in a 5" pot located in Tucson, Arizona.
Use our water calculator to personalize watering recommendations to your environment or download Greg for more advanced recommendations for all of your plants.
Water 0.5 cups every
9

Check the growing potential in your area
A plant's growing potential is determined from its location, the time of year, and current local weather.
Tucson, Arizona
48% Low

Growing Great Rhododendron in Tucson right now
Plant growth potential is currently medium 👌
January 27th, 2023
Sunlight energy as measured by “net radiation” in Tucson is currently medium 👌.
The availability of high quality sunlight in your home impacts ability for plants to thrive and is key in determinin…
Sunlight will increase by 23.4% ☀️
January 26th, 2023
Tucson is trending towards greater sunlight intensity!
The amount of sunlight in Tucson is expected to increase by 23.4% over the next 2 weeks to an average of 13.0 megajoules of energy per m2 per…
Daylight will increase by 0.7 hours 📈
January 28th, 2023
This month, Tucson is getting an average of 9.4 hours of clear sky sunlight per day.
Hours of daylight will increase by 7.1% over the next two weeks. Your plants will get 10.7 total hours of dayli…
Finding light for Great Laurel in your home

a window
Great Rhododendron love being close to bright, sunny windows 😎.
Place it less than 1ft from a south-facing window to ensure it receives enough light to survive during this time of reduced sunlight intensity in Tucson, Arizona ⛅.
Great Rhododendron does not tolerate low-light 🚫.

How to fertilize Great Rhododendron

Most potting soils come with ample nutrients which plants use to produce new growth.
By the time your plant has depleted the nutrients in its soil it’s likely grown enough to need a larger pot anyway.
To replenish this plant's nutrients, repot your Great Rhododendron after it doubles in size or once a year—whichever comes first.
When to repot Great Rhododendron
Is this a good time of year to repot? No ⏳
January 26th, 2023
The growing potential in Tucson is low 📉.
Repotting in late fall or winter when the day lengths are shorter can be very stressful for a plant and cause it to go into shock.
It's best to repot …

Great Rhododendron is generally easy to care for, though some plant parents report facing challenges with growing it. Check out the reviews down below to read more about their experiences!
Water Needs
Great Rhododendron prefers for the soil to dry out between waterings and should be watered regularly. Use our water calculator to personalize watering recommendations to your environment or download Greg for more advanced recommendations for all of your plants.
Sunlight Needs
Great Rhododendron requires abundant, bright and direct light. Place it less than one foot from a window to ensure it receives enough light to survive 💪. Select your region to see how the current weather in your area affects the placement in your home 🏡.
Toxicity
Great Rhododendron is extremely dangerous if consumed. If you, a family member, or a pet has ingested any amount of plant material contact Poison Control, US (800) 222-1222, or your veterinarian immediately. Great Rhododendron is not recommended for homes with children, cats, or dogs.
Humidity
Great Rhododendron doesn’t require additional humidity. Plants absorb most water through their root system rather than their leaves, so the best way to provide humidity for your plants is through watering the soil.
Soil
Great Rhododendron does best in well-draining soil. A good soil will contain lots of organic matter such as coco coir as well as perlite or vermiculite to help with drainage. Adding a handful of perlite to regular store-bought potting soil should do the trick!
Fertilizer
Great Rhododendron grows very slowly and doesn’t require added fertilizer. Replacing your plant’s potting soil once a year should provide them with more than enough nutrition. Remember, plants get their energy from sunlight, not fertilizer!
Native Region
Great Rhododendron is native to Asia and North America.
Growth Pattern
Great Rhododendron grows vertically and new growth will emerge from the top of the plant.
Growing Outdoors
USDA Hardiness Zone
Great Rhododendron can be grown outdoors in USDA Hardiness Zones 3a-7b. Find your local hardiness zone here.
Care Summary for Great Rhododendron
Great Rhododendron
Greg recommends:

0.5 cups every 9 days

< 1ft from a window

Repot after 2x growth
Based on your location in Tucson, Arizona, the 4” pot your plant is in, and that it doesn’t get direct sunlight.
