Overview
Phippsia algida (C.J. Phipps) R. Br. var. algidiformis (H. Sm.) Boivin, also known as Arctic scallopweed, is a small, evergreen plant that is native to the Arctic and subarctic regions of North America, Europe, and Asia.
Appearance
The plant typically grows to a height of 3-7 cm and has a dense rosette of needle-like leaves that are green to dark green in color. The leaves can grow up to 1.5 cm long and are sharply pointed. The flowers are small and white, appearing on short stalks in early summer.
Uses
Arctic scallopweed is primarily used as a decorative plant in rock gardens and alpine gardens. It is also sometimes used as a ground cover in areas with poor soil quality, as it is tolerant of harsh conditions and can grow in areas with little to no soil. In addition, some indigenous peoples in the Arctic have used the plant for medicinal purposes.
Common Names
Arctic scallopweed is also commonly known as Phipps' scallopweed, Phippsia procera, and Scotia's draba. However, it is generally referred to by its scientific name to avoid confusion among different species.
Overall, Phippsia algida var. algidiformis is a hardy and adaptable plant that is prized for its ability to thrive in harsh environments.hereLight Requirements
Phippsia algida var. algidiformis prefers full sun to partial shade. In the wild, this plant grows in rocky areas exposed to sunlight. Therefore, it requires a minimum of six hours of direct sunlight per day. Insufficient light may result in weak growth and foliage discoloration.
Temperature Requirements
This plant can tolerate a wide range of temperatures but prefers cool temperatures between 10°C to 20°C. It can survive in temperatures as low as -15°C. High temperatures, especially above 25°C, can stress the plant and cause wilting. During winter, the plant can go dormant, and it is important to protect it from frost.
Soil Requirements
Phippsia algida var. algidiformis thrives best in well-draining soil. It prefers slightly acidic soil with a pH range between 5.5 and 6.5. The plant is native to areas with nutrient-poor rocky soil, and it can grow in poor soil conditions. However, it benefits from the addition of organic matter such as compost. Waterlogged soil can cause root rot, and it is crucial to ensure proper drainage.
Cultivation Methods
Phippsia algida var. algidiformis is a hardy plant that is a great addition to any garden. It thrives in a variety of soil types, including well-draining soils and even poor soils. It is essential to plant it in a sunny location, preferably in a spot that gets direct sunlight for at least 6 hours a day. To plant the Phippsia algida, dig a hole that is slightly larger than the root ball of the plant. Loosen the soil in the hole and mix it with compost. Place the plant in the hole and fill it with the soil and compost mixture. Water the plant thoroughly and add more soil if needed.Watering Needs
The Phippsia algida var. algidiformis requires moderate watering. Water the plant when the soil is dry to the touch, but be careful not to overwater it. Overwatering can lead to root rot and other diseases. During the hot summer months, the plant may require more frequent watering.Fertilization
Fertilization is essential for the Phippsia algida var. algidiformis to thrive. Fertilize the plant once a month during the growing season, which is typically from spring to fall. Use a balanced fertilizer that is high in nitrogen, phosphorus, and potassium. Avoid fertilizing the plant during the winter months when it is dormant.Pruning
Pruning is necessary to maintain the shape and size of the Phippsia algida var. algidiformis. Prune the plant in early spring before new growth appears. Cut back any dead or damaged branches and remove any growth that is weak or spindly. To promote bushier growth, pinch back the tips of the stems. Regular pruning will help the plant to produce more flowers and maintain a healthy appearance.Propagation of Phippsia algida var. algidiformis
Phippsia algida var. algidiformis is a rare alpine plant that grows in harsh environments. It is not commonly cultivated, but propagation is possible through several methods.
Seed Propagation
The easiest way to propagate Phippsia algida var. algidiformis is through seed. The seeds are tiny and should be collected in the fall. Store them in a cool, dry place until the following spring. Sow them in a sterile, well-draining mix in trays or pots. Keep them moist and in a cool, bright location. Germination can take several weeks to several months depending on the conditions.
Vegetative Propagation
Phippsia algida var. algidiformis can also be propagated vegetatively through division or cuttings. Division is best done in the spring or fall. Simply dig up the plant and divide the rootball into several sections. Replant the sections in well-draining soil and keep them moist until they are established. Cuttings can be taken in the summer, when the plant is actively growing. Take a 3-4 inch cutting from the tip of a stem and remove the lower leaves. Dip the cut end in rooting hormone and plant it in a well-draining mix. Keep it moist and in a bright location until it roots.
Care and Maintenance
Regardless of the propagation method used, the young plants should be kept in a location with bright, indirect sunlight until they are established. Once established, Phippsia algida var. algidiformis prefers cool, moist conditions and well-draining soil. Plants should be watered regularly, but not allowed to sit in water. Fertilization is not typically necessary, but a balanced, slow-release fertilizer can be applied in the spring.
Disease Management
Phippsia algida var. algidiformis is a hardy plant and is generally disease-resistant. However, if the conditions are not favorable, the plant may fall prey to several fungal diseases, such as stem rot, rust, and powdery mildew.
Stem Rot
Stem rot is caused by the fungus Sclerotinia sclerotiorum, and results in the wilting and decay of stem tissues. The infected tissues appear water-soaked and may also show the presence of white mold. The best management practice is to avoid wounding the stem tissues, practice good plant hygiene, and follow a crop rotation schedule.
Rust
The rust disease is caused by the fungus Pucciniastrum epilobii, and is characterized by the appearance of small orange to brown spots on the leaves. In severe cases, the leaves may fall off resulting in stunted growth. The best management practice is to remove the severely infected leaves, improve air circulation, and avoid overhead irrigation.
Powdery Mildew
Powdery mildew is caused by the fungus Erysiphe spp. and is characterized by the appearance of white, powdery spots on the leaves. The infected leaves may appear distorted and eventually fall off. The best management practice is to avoid overcrowding the plants, provide adequate spacing between plants, and use a fungicide spray if the infection has already occurred.
Pest Management
Phippsia algida var. algidiformis is not generally affected by pests. However, some pests may infest the plant and cause damage. The common pests that may infect the plant are aphids, mites, and caterpillars.
Aphids
Aphids are small, soft-bodied insects that suck the sap from the leaves and stems, causing the plant to wilt and turn yellow. The best management practice is to manually remove the insects, use a strong jet of water for washing off the aphids, and use a neem oil spray.
Mites
Mites are tiny pests that may infest the leaves and stems, causing discoloration and eventual decay of the tissues. The best management practices include regular inspection of the plants, maintaining adequate humidity levels, and spraying with insecticidal soap or horticultural oil if the infestation has already occurred.
Caterpillars
Caterpillars are the larvae of several butterfly and moth species, and feed on the leaves and stems, causing defoliation and stunted growth. The best management practice is to manually remove the caterpillars from the plants, use a spinosad or Bacillus thuringiensis spray, and avoid using harmful chemical insecticides.
