Japanese Iris Iris ensata 'Lasting Pleasure'

Water

The Japanese Iris 'Lasting Pleasure' requires consistent moisture, especially during the growing season. Water the plant thoroughly once a week, providing about one to two gallons per plant to ensure the soil remains evenly moist but not waterlogged. During periods of extreme heat or drought, increase the frequency of watering without over-saturating the soil. It's essential not to let the plant dry out, as Japanese Iris thrives in wet conditions, so paying close attention to soil moisture levels will keep your 'Lasting Pleasure' healthy.

Light

Japanese Iris 'Lasting Pleasure' performs best in full sun to partial shade. The ideal location provides at least six hours of direct sunlight daily, though some afternoon shade is beneficial in extremely hot climates. Avoid heavily shaded areas, as too little light can reduce blooming and weaken the plant. A spot that receives morning sunlight and dappled afternoon light would be ideal for this variety of Japanese Iris.

Temperature

Japanese Iris 'Lasting Pleasure' prefers temperate conditions and can tolerate a wide temperature range. The plant is hardy and can survive temperatures down to about -20 degrees Fahrenheit during dormancy in winter. The ideal growing temperature for the Japanese Iris is between 55 and 75 degrees Fahrenheit. However, it can withstand higher summer temperatures as long as it is adequately watered and not subjected to prolonged periods above 90 degrees Fahrenheit.

Pruning

Pruning of Japanese Iris 'Lasting Pleasure' usually involves the removal of spent flowers and dead foliage. Deadheading the flowers after they bloom encourages more blooms and prevents the plant from putting energy into seed production. Once the foliage starts to yellow in fall, cut it back to the ground to maintain plant health and appearance. Pruning is typically done annually, post-blooming, and as the plant enters dormancy.

Cleaning

As needed

Soil

Japanese iris 'Lasting Pleasure' thrives in acidic to neutral soil, with pH levels of 5.5 to 7.0. The best soil mix is one that is rich in organic matter, like a combination of loamy garden soil, compost, and peat moss, ensuring good drainage while retaining adequate moisture. Amend the mix with a balanced, slow-release fertilizer to provide essential nutrients.

Repotting

Japanese iris 'Lasting Pleasure' typically doesn't need frequent repotting. These plants should be divided and repotted every 3 to 4 years to rejuvenate and prevent overcrowding, ideally after they finish blooming in late summer or early fall.

Humidity & Misting

Japanese iris 'Lasting Pleasure' tolerates a range of humidity levels but prefers conditions that mimic its natural boggy habitat. A humidity level of around 60-70% is ideal for this plant, though it can adapt to slightly lower levels without significant harm.

Suitable locations

• Indoor

  Keep moist, provide bright indirect light, and maintain cool temps.

• Outdoor

  Plant in moist, acidic soil, full to partial sun.

• Hardiness zone

  4-9 USDA.

Life cycle

Iris ensata 'Lasting Pleasure', commonly known as Japanese iris, begins its lifecycle with seed germination, which requires a period of cold stratification to break dormancy. Upon germination in spring, seedlings emerge and develop into young plants featuring characteristic narrow, sword-like leaves. The plants establish their perennial root system, which includes rhizomes, allowing them to survive and regrow annually. Vegetative growth continues into the summer when the Japanese iris produces its strikingly large and colorful flowers, often in shades of purple, blue, or white. After flowering, the plant sets seed in the form of capsules, which eventually ripen and release seeds to complete the reproductive cycle. Throughout the fall and winter, the plant enters dormancy, with the rhizomes storing energy to support the next year's growth cycle.

Propogation

• Propogation time

  Late Summer to Early Fall

• Iris ensata 'Lasting Pleasure', commonly known as Japanese iris, is best propagated through division, a method which is typically performed after the blooming period in late summer to early fall. When the clumps become crowded, usually every three to four years, they should be lifted gently from the soil, using a fork or shovel. The rhizomes, which are horizontal stems growing just at or below the soil surface, should be carefully separated, ensuring that each division has at least one or two good fan-shaped growths of leaves. These divisions can then be replanted promptly into well-prepared soil, enriched with organic matter, to promote strong growth. It is crucial to plant the rhizomes at or just slightly below the soil surface and to water them thoroughly after planting. This method of propagation ensures genetic consistency and a robust bloom display in subsequent seasons.