Philadelphus lewisii, commonly known as Lewis' mock orange, is a deciduous shrub native to western North America. It typically reaches a height of 3 to 10 feet and features an upright growth habit with arching branches. The leaves are dark green, oval-shaped, and have serrated edges.
In late spring to early summer, the plant produces clusters of fragrant white flowers that resemble orange blossoms, hence the name "mock orange." These flowers attract bees and butterflies. After the flowering period, small brown capsules appear, containing numerous seeds.
Philadelphus lewisii thrives in full sun to partial shade and well-drained soil but can tolerate some drought once established. It is often used in landscaping as a specimen plant or in mixed borders for its attractive foliage and showy flowers.
Lewis' Mock Orange exhibits strong resistance to disease and is usually not vulnerable to illnesses. As for care, this plant is fairly low-maintenance. When grown outdoors it needs only light watering, and larger specimens typically do not require pruning. Smaller plants, however, should be pruned after they finish blooming. Lewis' Mock Oranget is suitable for anyone with an outdoor area, such as a garden or deck, and does not call for a lot of experience in plant care.
How to keep Philadelphus Lewisii.
Light
Lewis' Mock Orange does best with abundant sunlight, though it can tolerate somewhat reduced—but not severely lacking—light. Sunlight supplies the energy required for healthy growth and survival. Too much or too little light can weaken the plant, causing poorer growth and problems with flowering.
Water
Lewis' Mock Orange is a deciduous plant that thrives in moderate humidity and prefers consistent moisture. It should be watered every two weeks. This plant enjoys full sun or partial shade and requires well-draining soil. During its dormant period in the cooler months, its water needs decrease, and once established, it becomes drought-tolerant.
Temperature
The lewis' Mock Orange plant does best in temperate climates with temperatures from 32 to 95 ℉ (0 to 35 ℃). To adapt to seasonal changes, keep the plant in well-drained soil and water it moderately in spring and summer. Decrease watering in fall and winter. Avoid exposing it to temperatures below 0 ℃.
Fertilizer
Fertilize your Lewis' Mock Orange in early spring to encourage healthy growth. Regular feeding improves overall health, producing vigorous growth, greater tolerance of challenging conditions, and increased resistance to pests and diseases. Follow a consistent fertilization routine for your Lewis' Mock Orange to maintain lively foliage with deep color and a full, lush appearance.
Pruning
To keep Lewis' Mock Orange healthy and blooming beautifully, it should be pruned in late spring after it finishes flowering. Focus on a few key techniques: remove weak branches, thin out crowded stems, and cut back older wood. These steps help improve air circulation and light penetration, which encourages vigorous growth. Always use clean, sharp tools to prevent disease and maintain the plant’s shape, leading to better blooms.
Pot & Repot
When repotting Lewis' Mock Orange, select a pot 1-2 inches (2.5–5.1 cm) larger with ample drainage. Use a well-draining potting mix. Repot in spring or fall, making sure the root ball sits slightly lower than the rim of the flower pot. Water thoroughly after repotting and place it in a warm spot with indirect sunlight.
Botanical profile.
- Plant Type
- Shrub
- Life Cycle
- Perennial
- Genus
- Philadelphus
- Family
- Hydrangeaceae
- Hardiness Zone
- 3-9
- Mature Height
- 0.91 m to 2.74 m
- Mature Spread
- 3.05 m
- Leaf Color
- Green, Blue
- Leaf Type
- Deciduous
- Flower Color
- White
- Flower Size
- 2.54 cm to 5.08 cm
- Bloom Time
- Late spring, Early summer
- Planting Time
- Spring, Autumn
- Harvest Time
- Mid summer
Other names.
Reader questions.
How should I water Lewis' Mock Orange?
Using soaker hoses can be an effective way to keep leaves and flowers moist without getting the entire plant wet. Simply lay the hose around the plant and leave it on for 30 to 45 minutes, ensuring the soil is moist but not overly saturated. Another option is to connect your regular hose to the soaker hose and cover it with mulch for continuous moisture throughout the day. If you have Lewis' Mock Orange planted in pots, it's best to use a watering can. Water the plant until you see water dripping out from the bottom of the pots. This method allows the water to reach the roots and promote healthier growth.
Why should I add fertilizer to my Lewis' Mock Orange?
No matter what type of Lewis' Mock Orange you have, regularly fertilizing it will promote optimal health and growth. Providing the right nutrients will result in stronger growth, increased resilience to difficult conditions, and improved ability to combat diseases and pests. It's important to maintain the foliage of your Lewis' Mock Orange, as it is a key attractive feature. To achieve this, establish and follow a consistent fertilization schedule tailored to your specific plant. By doing so, your Lewis' Mock Orange will produce vibrant leaves with a rich color and a lush appearance.
What are the sun requirements for Lewis' Mock Orange?
Lewis' Mock Orange requires specific sunlight conditions to thrive. For optimal growth, it needs full sun, which is above 6 hours of sunlight per day. However, it can also grow in partial sun, receiving about 3-6 hours of sunlight. It's important to monitor how sunlight moves through your garden to find spots that offer the right balance of light and shade, ensuring the plants' health and happiness.
What are the ideal growing conditions for Lewis' Mock Orange?
Lewis' Mock Orange thrives in temperate environments and prefers a temperature range of 32 to 95°F (0 to 35°C). It is important to plant it in well-drained soil and to ensure moderate watering during the summer and spring months. Watering should be reduced during the winter and fall to adjust for different seasonal needs. Although Lewis' Mock Orange has strong cold resistance and usually does not require special frost protection measures, if winter temperatures are expected to drop below -35°C, it's advisable to wrap the trunk and branches with materials such as non-woven fabric or cloth. Additionally, before the first freeze in autumn, watering the plant abundantly to keep the soil moist can help prevent drought and water scarcity during the colder months.
What should I do if I give Lewis' Mock Orange too much or too little water?
If you have overwatered Lewis' Mock Orange, there are a few steps you can take to prevent further damage. Despite this, the plant is hardy and has a good chance of surviving. To help the plant recover, give it a chance to dry out and stop watering it. It's important to note that the plant's roots don't like to sit in water for extended periods, so aerating the soil can be beneficial. Some signs of overwatering include the premature yellowing and falling of leaves, fewer flowers, and misshapen buds. In severe cases, the leaves may wilt and turn brown, indicating long-term damage such as root rot. On the other hand, underwatering can also cause wilting in Lewis' Mock Orange. To check if the plant is dehydrated, feel the soil by sticking your finger into it. If the soil feels too dry, this is a sign that it needs more water. It's important to add water in the evening if the plant is not receiving enough. Remember to always check the soil for dryness and follow a regular watering schedule in the morning.
When should I fertilize my Lewis' Mock Orange?
To properly fertilize your Lewis' Mock Orange, start by applying fertilizer in late winter or early spring. This will provide the necessary nutrients for healthy growth when the weather becomes warmer. Additionally, if you live in a warm climate region, it is recommended to fertilize your Lewis' Mock Orange again in early fall. This will give the plant extra nutrients for the following growing season and help it withstand the winter cold without foliage damage. Fertilizing earlier in the fall will also give the new branches enough time to grow and be stronger against the winter.
How does sunlight affect the growth of Lewis' Mock Orange?
Sunlight plays a crucial role in the development and survival of Lewis' Mock Orange. Adequate sun exposure ensures the plant grows healthy and strong, whereas both overexposure and underexposure can lead to less vigorous growth and flowering issues. During less sunny conditions or winter, artificial lighting can be employed to support its growth, with variations in lighting requirements based on the type of plants (full sun, partial sun, or full shade plants) and specific details on how to implement artificial lighting effectively.
How does Lewis' Mock Orange react to low temperatures, and what are the solutions if damage occurs?
Lewis' Mock Orange is notably cold-tolerant, ideally staying above 0°C during the winter months and should not be exposed to temperatures below -30°C. When temperatures fall below -35°C, the plant may not show immediate signs of distress during winter, but by spring, the branches might become brittle, dry, and fail to produce new shoots. The solution for this type of damage is to prune away any dead branches in the spring that have not sprouted new leaves.
How often should I water the Lewis' Mock Orange plant?
To ensure proper watering for the Lewis' Mock Orange, it is recommended to water it deeply two to three times a week. However, if you live in a hot climate, you may need to water it more often. The plant requires average water needs and prefers moist but well-drained soil. A useful tip is to check the soil moisture by feeling it. If you notice the top 2-4 inches of soil are dry, it is likely time to water your plant. If the Mock Orange is planted outdoors, watering it 1-2 times a week should be sufficient. Keep in mind that outdoor plants receive moisture from rainwater, so it is best to reduce watering when rainfall is plentiful.
When is it a bad idea to put fertilizer on my Lewis' Mock Orange?
Do not fertilize your Lewis' Mock Orange during specific periods throughout the year. Firstly, avoid fertilizing during the early and mid-winter months when the plant is dormant and does not require feeding. Secondly, it is not recommended to fertilize during the late spring and summer when the weather is hotter and drier. These conditions can have a detrimental effect on the plant if fertilization is performed. To prevent these issues, stick to a fertilization schedule that includes feeding only in early spring and early fall.
What are the important symptoms of light deficiency or overexposure in Lewis' Mock Orange?
Lewis' Mock Orange may show several symptoms if it doesn't receive the right amount of light, including smaller new leaves, leggy or sparse growth, faster leaf drop, slower or no new growth, lighter-colored new leaves, as well as symptoms from excessive sunlight like chlorosis, sunscald, leaf curling, wilting, and leaf scorching. These symptoms indicate issues with photosynthesis, hydration, and overall plant health due to inadequate light conditions.
What are the effects of high temperatures on Lewis' Mock Orange and how can they be mitigated?
During the summer, it's crucial to keep Lewis' Mock Orange in conditions below 35°C. Exposure to temperatures above 38°C can cause the leaves to lighten in color, tips to become dry and withered, and make the plant more susceptible to sunburn. To mitigate these effects, trim away the sunburned and dried-up parts. Moving the plant to a shadier location during the midday and afternoon sun, or using a shade cloth, can protect it from excessive heat. Additionally, watering the plant in the morning and evening helps keep the soil moist and reduces stress on the plant.
