Rosa glauca
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Rosa glauca

Red-leaved Rose · Redleaf Rose · Glaucous Rose · Blue-leaved rose

Tier 1 Difficulty: hard Water: moderate Light: full_sun Toxicity: low
Water every
7 days
Temperature
5–35 °C
Soil pH
5–7
Hardiness
Zone 2–9
Click count
171
Observations
735

Description

Source: leafsnap

Rosa glauca, commonly known as the Redleaf Rose or the Blue-leaved Rose, is a deciduous shrub in the Rosaceae family. Native to Europe and western Asia, this plant can reach heights of 2 to 3 meters. Its distinctive blue-green leaves turn reddish-purple in autumn, adding a striking visual interest to any garden. The Redleaf Rose produces pink or light purple flowers with five petals that bloom from late spring through summer. These blooms are followed by small red hips, which are edible and can be used to make jams or teas. This shrub thrives in full sun but can also tolerate partial shade. It prefers well-drained soil and requires regular watering during its growing season, though it becomes relatively drought-tolerant once established. Rosa glauca is valued not only for its ornamental beauty but also for its medicinal properties. High in vitamin C, antioxidants, and anti-inflammatory compounds, its leaves have been used in traditional medicine to treat fever, diarrhea, sore throat, and skin infections. Overall, Rosa glauca is an attractive ornamental shrub with uniquely colored foliage and medicinal benefits, making it a popular choice among gardeners around the world.

🌳 Dog rose has moved beyond being merely ornamental and makes a significant contribution to ecosystems. Its dense, thorny growth provides excellent shelter for birds and small mammals. The hips are an important food source for wildlife in the fall and winter months, especially for birds like thrushes and waxwings. It can also signal soil conditions: dog rose may show changes in leaf and stem morphology that indicate the presence of certain metals in its growth environment.

🎭 Affection, chastity, matrimony

Care Guide

💧 Water Every 7 days

The Redleaf rose is native to mountainous regions and thrives in conditions of consistent moisture with well-drained soil. To mimic its natural environment of infrequent rainfall, it should be deeply watered every three weeks. This plant is resilient and can adapt well to different levels of rainfall, making it an excellent choice for outdoor planting.

Suggested frequency: Every 7 days
FAQ
What's the best way to water my Redleaf rose?

To ensure excellent root development, place a garden hose at the base of your plants. Avoid spraying water directly on the leaves, and keep in mind that outdoor plants in direct sunlight may need more watering. You can use bubblers or soaker hoses to moisten the roots of each plant. When adding or removing plants, use soaker hoses that cover the entire garden or bed to help push the roots deeper into the soil. Remember to drain any excess water and wait for the soil to dry before watering again. Water at ground level to prevent diseases. On sunny days, it can be beneficial to spray the entire bush with water. Whether your Redleaf rose is potted or in the ground, deep watering is preferable to light sprinkling.

What do I do if I give too much/not enough water to a Redleaf rose?

If a Redleaf rose is overwatered, you may notice yellowing, wilting, and dropping leaves, as well as a dull and unhealthy appearance with mushy stems. Adjust your watering schedule when you see these signs. On the other hand, wilting can also indicate under watering, where the leaves become crisp and dry. If the soil is dry and watering alone is insufficient, fully water the plant. This will help the Redleaf rose recover, but it may still have dry and yellow leaves due to damage to the roots. Once it returns to normal, the yellowing of leaves will stop. When keeping the Redleaf rose indoors, regularly check the moisture levels in the pot and avoid overwatering. Look for signs of black spots, and if present, allow the soil in the pot to dry out for a few days. Overwatering can lead to root rot, so consider transferring the plant to a different pot if you notice discolored and slimy roots. Always prevent root rot by avoiding overly soggy soil. When planting your Redleaf rose outdoors, dig a bit deeper and if the soil feels too dry when checking with your fingers, it may indicate under watering. Make sure to provide adequate watering to help the plant recover.

How many times do I need to water my Redleaf rose?

The Redleaf rose prefers to be watered deeply but infrequently. When watering this plant, it is recommended to soak it with a gallon of water, especially if it is planted in pots. Pots have limited water storage and the soil tends to dry out faster. In cold regions, watering is necessary every 3 to 5 days. It is best to water the plant early in the morning when the soil is dry, whether it is kept outdoors or indoors. To determine if watering is needed, check the soil inside the pot. If the top 2-3 inches of soil are dry, it is time to give the plant a thorough watering. On hot days, check the moisture levels daily, as the heat can quickly dry out the soil in the pot. If you have a garden, the soil also needs to be irrigated. In hot climates, watering once a week is sufficient. Only water when you notice that about 2 to 3 inches of soil have become too dry. Take into consideration the amount of rainwater the plant has received to avoid overwatering and prevent root rot. If there is a significant amount of rainfall, additional watering may not be necessary. The Redleaf rose typically grows during spring and fall. When planted outdoors, adding a layer of mulch that is about 3 to 4 inches deep can help conserve water. Sandy soil tends to drain faster, so plants in sandy soil should be watered more frequently. On the other hand, plants in clay soil can be watered less frequently, allowing 2-3 days for the soil to dry out before watering again to avoid root rot. To keep track of watering, mark the date on a calendar and pay attention to the leaves. Drooping leaves may indicate that watering is needed, signaling that you may be a day late in watering the plant.

How much water does my Redleaf rose need?

The Redleaf rose generally needs about a gallon of water on a consistent schedule. For potted plants, water them deeply until you see water dripping from the bottom of the pot. Then, wait for the soil to dry before watering again. You can use a water calculator or moisture meter to determine how much water you've given your plant in a week. During the flowering period, provide plenty of water but allow the moisture to evaporate afterwards to avoid root rot. If the Redleaf rose is planted outdoors and receives adequate rainfall, it may not need additional watering. However, when the Redleaf rose is young or newly planted, ensure it receives 1-2 inches of rain per week. As the Redleaf rose grows, it can rely solely on rainfall. Only when the weather is extremely hot or there is no rainfall for 2-3 weeks, should you consider giving the Redleaf rose a full watering during the cooler part of the day to prevent damage from high heat. Additional watering will be necessary during prolonged dry periods.

Should I change how often I water my Redleaf rose depending on the time of year or the weather?

To ensure the healthy growth of the Redleaf rose, proper watering is essential. In general, this plant relies on rainfall when grown outdoors, except during persistent dry weather when watering is necessary. During the spring and fall seasons, the soil should be kept moist but not saturated, and alternating between dry and moist conditions promotes optimal growth. In the summer, hot weather can cause water to evaporate quickly, so additional watering may be required if there is a lack of rainfall. During winter, the Redleaf rose needs less water as it goes dormant. Using a well-draining soil mixture can aid in faster water evaporation. Once the plant starts to leaf out in the spring, watering can be skipped since fall and winter rains usually suffice for the entire dormant period. Adequate drainage is vital to prevent waterlogged roots, especially in pots. When watering, it's best to deeply soak the entire root system once or twice a week, depending on the weather, instead of shallow sprinkles that may encourage fungi growth. In the fall and winter, even during dormancy, it's important to avoid letting the plants dry out completely. Over-watering should be avoided as well since the Redleaf rose does not tolerate sitting in water for extended periods, which can be fatal during winter. Applying mulch can help alleviate stress, conserve water, and promote healthy blooms.

☀️ Light Full sun

The dog rose requires a substantial amount of sunlight, which is helpful for its strong growth. It is essential that it gets plenty of unobstructed sunlight, although it can adjust fairly well in places where the sunshine is partially filtered. It thrives under the strong, direct sunlight in its natural habitat. Insufficient light can impede its connection with the sun, limiting its flowering, while excessive sunlight can put the plant under stress.

Ideal: Full sun
FAQ
What are the sun requirements for Redleaf rose?

The Redleaf rose requires conditions ranging from full to partial sun to thrive effectively. Full sun means the plant needs more than 6 hours of sunlight daily, while partial sun refers to about 3-6 hours of sunlight. It's essential to observe the movement of sunlight through your garden to ensure the chosen spots provide the right balance of light and shade, promoting the plant's health and happiness.

How essential is sunlight for the growth of Redleaf rose?

Sunlight is crucial for the growth and vibrancy of the Redleaf rose, as the plant prefers areas abundant in sunlight or that receive a reasonable amount of the day's sunlight. While it can tolerate some variation in light due to its diverse origins, inadequate or overly intense sunlight can impede its growth. In spaces with insufficient natural light, artificial lighting can be a solution, with specific recommendations for the type of light, intensity, distance, and duration to emulate natural conditions and promote healthy growth.

What symptoms indicate light deficiency or overexposure in Redleaf rose?

The Redleaf rose can show various symptoms in response to light deficiency or overexposure. Deficiency symptoms include smaller new leaves, leggy growth, faster leaf drop, slower or no new growth, and lighter-colored new leaves. Overexposure symptoms include chlorosis (leaves turning yellow), sunscald, leaf curling, wilting, and leaf scorching. These symptoms help identify the plant's need for an adjustment in its lighting conditions.

How can I manage sunlight exposure for Redleaf rose to address these symptoms?

To manage sunlight exposure for Redleaf rose and address light-related symptoms, follow different strategies based on where the plant is located. Indoors, gradually move the plant to sunnier spots, achieve at least 6 hours of direct sunlight, and consider using artificial light for additional support. Outdoors, move plants gradually to sunnier locations to prevent sunburn. Also, for plants in the ground, reducing obstructions like pruning trees or transplanting to sunnier spots can improve sunlight access. It's crucial to provide the right conditions to encourage healthy new growth, even though parts of the plant damaged by poor light conditions may not recover.

🌡️ Temperature 5–35°C

The dog rose plant originates from temperate zones and is adaptable to diverse temperatures ranging from 5 to 35 ℃ (41 to 95 ℉). Nonetheless, it is more comfortable in a temperature range of 18 to 24 ℃ (64 to 75 ℉). Throughout the winter season, the plant enters a dormant state and can endure temperatures as chilly as -20 to -25 ℃ (-4 to -13 ℉). In warmer climates, it's advisable to position it in areas with partial shade to avert heat strain.

Ideal temperature: 5–35°C
FAQ
What is the native temperature range for Redleaf rose (Rosa glauca) and how does it affect its growth?

The Redleaf rose, scientifically known as Rosa glauca, is native to areas where temperatures fluctuate between 32 to 90 °F (0 to 32 °C). It grows optimally within this temperature range, highlighting its versatility in adapting to varying conditions. To ensure its health and growth, it's crucial to make adjustments corresponding to the seasonal temperatures, especially when they significantly deviate from this preferred range. Redleaf rose exhibits strong resistance to cold, negating the need for frost protection measures in most cases. However, if temperatures are expected to plummet below -35°C, implementing cold protection by wrapping the trunk and branches with non-woven fabric or cloth is advisable. Additionally, abundant watering before the first freeze in autumn keeps the soil moist, ensuring the plant remains hydrated through the winter and early spring, mitigating the risks of drought and water scarcity.

How should Redleaf rose be cared for in low temperatures, and what are the symptoms of cold damage?

Redleaf rose is renowned for its cold tolerance, thriving best when temperatures remain above 0°C and ideally, it should be kept above -30°C. Despite its resilience, exposure to temperatures below -35°C might not show immediate visible damage during winter; however, come spring, the effects become noticeable. Symptoms of cold damage include branches that turn brittle and dry, coupled with the absence of new shoots emerging. To mitigate these effects, it's recommended to prune away any dead branches that have failed to produce new leaves in the spring, fostering healthier growth and recovery from the winter's harshness.

How does Redleaf rose react to high temperatures, and what measures should be taken?

During the hotter months, the Redleaf rose should ideally not experience temperatures exceeding 32°C. When the mercury soars above 35°C, the plant's leaves may begin to lighten in color, and the tips might dry out and wither, making the plant more prone to sunburn. To care for the Redleaf rose in such conditions, it's essential to trim away the sunburned and dried-up portions of the plant. Moving the plant to a shaded area during the peak sun hours or employing a shade cloth can protect it from excessive sun exposure. Additionally, watering the plant in the morning and evening helps to keep the soil at an optimum moisture level, further safeguarding it from the stress of high temperatures.

💨 Humidity
Humidity:
🪴 Soil 5-7
Soil pH: 5-7
🌱 Fertilizer

For robust growth, apply fertilizer to your Dog rose at the beginning of spring. Consistent fertilization boosts overall well-being, promoting sturdy growth, the ability to withstand harsh environments, and heightened resistance to diseases and pests. Adhere to a particular fertilization routine for your Dog rose to guarantee vivid leaves with rich color and a dense look.

FAQ
Why should I use fertilizer on my Redleaf rose?

Fertilizing your Redleaf rose is important for several reasons. Firstly, it helps your rose produce beautiful blooms. To ensure excellent flowers in the spring season, it is best to fertilize in early spring. Additionally, fertilizer provides your Redleaf rose with energy that it can store in the ground during its dormant growth phases. By giving your rose extra nutrients in the fall or late spring, it will have more energy to use when it starts actively growing again.

When should I fertilize my Redleaf rose?

When fertilizing Redleaf rose, timing is crucial. If you apply fertilizer too early while the rose is still dormant, it won't be effective and will be washed away by rainwater, contributing to waste and pollution. The first application of fertilizer should be in early spring, and then continue fertilizing once a month until early summer.

When is not a good time to use fertilizer on my Redleaf rose?

To ensure optimal growth and bloom development for your Redleaf rose, it's important to follow these fertilizer guidelines. First, avoid using a nitrogen-rich fertilizer as it can result in excess leaf growth and reduced blooming. Instead, opt for a fertilizer with a lower nitrogen level compared to other nutrients. Secondly, refrain from fertilizing after early autumn, as this can spur excessive growth before winter sets in. Additionally, avoid fertilizing your Redleaf rose during hot and dry periods since dry soil hampers fertilizer absorption and can lead to stimulated growth that requires more water than may be available. The best time to apply fertilizer is earlier in the season when temperatures are cooler. Lastly, keep in mind that nearby plants or lawns can also absorb the applied fertilizer, so be careful not to unintentionally give your tree or shrub a double-dose.

What kind of fertilizer should I use for my Redleaf rose?

To ensure optimal growth and beautiful blooms for your Redleaf rose, it's important to choose the right fertilizer. A balanced fertilizer with slightly higher levels of phosphorus is recommended. Another option is to enrich the soil with organic materials like compost, worm castings, and manure. When the flower buds start appearing, experienced gardeners often supplement with water-soluble fertilizers containing phosphorus. This helps the flowers develop better, resulting in larger blooms that last longer. There are various forms of fertilizers available, but liquid or powdered options are considered the best for Redleaf roses. Regardless of the form you choose, remember to dilute the fertilizer and apply it while watering your Redleaf rose.

How do I make my Redleaf rose plant grow better?

To properly fertilize your Redleaf rose, it's important to follow the directions for the specific fertilizer you are using and do some research. Avoid over-fertilizing by determining the right amount, which can be based on the age of the tree or the trunk diameter. As a general guideline, use about one-tenth of a pound of fertilizer per year or per inch of trunk, up to a maximum of one pound. For granular and organic fertilizers like blood meal, sprinkle them around the base of the tree, extending to the drip line, without letting the fertilizer come in contact with the trunk. Over time, the granules will break down and filter into the soil for root absorption. After fertilizing, apply a one-inch layer of compost around the base of the tree and water thoroughly.

🪴 Pot & Repot 2-3 years

When you're replanting Dog rose, select a pot that is 1-2 inches (2.5-5 cm) bigger with sufficient drainage. Utilize a potting mix that drains well. Choose to repot either in the spring or the fall, making sure the root ball sits a bit below the flower pot rim. After the repotting process is complete, water the plant generously and position it in a cosy area that receives indirect sunlight.

Suggested frequency: 2-3 years
✂️ Pruning

The Redleaf Rose is characterized by its unique gray-green leaves and reddish stems. For optimal growth, it's important to prune these plants in early spring. Begin by removing any dead or crossing branches, and trim back a third of the older canes to encourage new growth. Regular pruning not only enhances flowering but also improves the plant's overall structure. Always use clean tools when pruning to prevent the spread of disease.

🌿 Propagating
🐛 Diseases & pets
☠️ Toxicity

Rosa glauca is non toxic. They are guaranteed perfect as a household ornamental.

Characteristics

Plant Type
Shrub, Vine
Life Cycle
Perennial
Genus
Rosa
Family
Rosaceae
Hardiness Zone
5-9
Mature Height
0.91 m to 4.88 m
Mature Spread
0.91 m to 4.57 m
Leaf Color
Green, Blue
Leaf Type
Deciduous
Flower Color
Pink, White
Flower Size
4.06 cm to 6.35 cm
Bloom Time
Late spring, Early summer, Mid summer
Planting Time
Autumn, Winter, Spring
Harvest Time
Mid summer
Native Area
Turkey, Sweden, Austria, Slovakia, Montenegro, Pakistan, Slovenia, Morocco, Croatia, Belarus, Uzbekistan, Russia, Iraq, Germany, Romania, Belgium, Moldova, Portugal, Netherlands, France, Tajikistan, Tunisia, Czech Republic, Cyprus, Bulgaria, Poland, Armenia, Greece, Ukraine, Serbia, Lebanon, Norway, Afghanistan, Syria, Kyrgyzstan, Kazakhstan, Italy, Spain, Switzerland, Denmark, Finland, Iran, Albania, Ireland, United Kingdom, Hungary, Algeria, Azerbaijan, Turkmenistan

Tags (34)

Common Names (4)

en Red-leaved Rose
en Redleaf Rose
en Glaucous Rose
en Blue-leaved rose