Johin Japanese Maple (Acer ‘Johin’)
Also known as: Acer 'Johin', Red Full Moon Maple.
The Johin Japanese Maple (Acer ‘Johin’) is easily recognized by its unique leaf color, which combines light yellow-green with a dark green edge. As the tree ages, it develops a twisted and interesting trunk that is highly valued by those who practice bonsai. In spring, the tree is adorned with soft white flowers, enhancing its beauty before the leaves change to impressive shades of red, yellow, and orange in the fall. This tree grows slowly and is simple to maintain, becoming more striking as it matures. Its suitability for small gardens, patios, and courtyards contributes to its popularity.
Interesting facts about the Johin Japanese Maple:
- Meaningful Moniker: “Johin” translates to “Elegant” in Japanese, perfectly capturing the tree’s graceful form and captivating foliage. Its deeply lobed leaves unfurl with a dramatic cascading effect, resembling a flowing waterfall of green hues.
- Nature’s Calligraphy: While most Japanese maples have seven lobes, the Johin boasts a unique nine-lobed pattern. Each slender lobe features prominent green veins that seem like delicately painted brushstrokes against the vibrant shades of red throughout the growing season.
- Rainbow Repertoire: Unlike standard red Japanese maples, ‘Johin’ puts on a stunning four-season color show. Spring unveils vibrant orange-red and purple-red hues with contrasting lime-green veins. Summer tones shift to a richer brick red, while autumn erupts in a fiery display of oranges and reds. Even winter offers subtle beauty with reddish-brown bark against the snowy landscape.
- Mini Marvel: Contrary to some towering Japanese maples, the Johin stays petite, reaching only 2 meters tall with a 1.5 meters spread in 10 years. This makes it an ideal choice for smaller gardens or container-growing, bringing its cascading elegance to balconies and patios.
- Hardy Hero: This maple holds the distinction of being one of the most cold-tolerant Japanese maples, thriving in zones 5-9. It braves temperatures as low as -15°F (or about -26°C), allowing gardeners in colder climates to experience the joys of this captivating cultivar.
- Serene Symbol: In Japanese culture, maples embody beauty, harmony, and the fleeting nature of life. The Johin, with its elegant form and ever-changing color palette, perfectly exemplifies these symbolic notions. It’s often incorporated in traditional gardens and considered a peaceful focal point for meditation and reflection.
- Feathery Flyers: Look closely around your Johin maple in fall – you might witness tiny whirlybirds called samaras. These winged seeds float gracefully on the breeze, dispersing the tree’s offspring and adding a touch of whimsical magic to the autumn spectacle.
Plant care guide:
Watering
Johin Japanese Maple should be watered about every 5-7 days with about 1 gallon of water on each occasion. Water should be applied slowly and evenly so that the soil is thoroughly soaked. Generally, it is better to water your plant deeply only once instead of a little bit every day.
Sunlight
The Johin Japanese Maple needs full sun in the morning and afternoon, as well as some afternoon shade. It should receive at least 6 hours of direct sunlight each day, with a minimum of 4 hours in the morning and 2 to 4 hours in the afternoon. Avoid exposing it to intense midday sun as it is more susceptible to sunburn.
Pruning
Johin Japanese maples should be pruned in early spring, before new growth appears. Pruning should be light, removing no more than 10-15% of the tree at each pruning session. Pay particular attention to crossing or exposed branches, and those that are crossing the center of the tree. Heavy pruning should be avoided, as this encourages weak and leggy growth. Additionally, take care not to prune away any flower buds or new shoots that are forming.
Plant information:
- Family: Sapindaceae
- Type: Tree
- Height: ~7.62 meters
- Cycle: Perennial
- Growth Rate: Low
-
Anatomy:
- Leaves: bright-red
- Veins: yellow
- Stems: red
- Care Level: Medium
-
Watering:
- ~3.79 litres
- Average
- Every 7-10 days
- Sunlight requirement: full sun, part shade
- Pruning:
- March, April
- Propagation: Air Layering Propagation, Grafting Propagation, Cutting, Division, Seed Propagation
- Origin: Japan
- Seeds: No
- Drought Tolerant: No
- Salt Tolerant: No
- Thorny: No
- Invasive: No
- Tropical: No
- Indoor: No
- Flowers: No
- Cones: No
- Fruits: No
- Edible Fruit: No
- Leaf: Yes
- Edible Leaf: No
- Cuisine: No
- Medicinal: No
- Poisonous to Humans: No
- Poisonous to Pets: No
Sources & more information:
Content is based on public databases such as the KEW Plants of the World database, among others. Please double-check all information. "About Plants" does not take responsibility for any inaccuracies.