Why do roses change color

Roses cultivated in winter often have petals that become darker in color, and some even have purple-red or blue-purple petals, seriously reducing the commerciality of rose cut flowers and reducing the efficiency of rose planting.
Roses can show different colors because the main components of anthocyanins are compounds such as flavonoids, anthocyanins and carotenes. Differences in the types, proportions and locations of these compounds contribute to the rich colors of rose petals. Any factors that can affect anthocyanin synthesis will affect the final flower color.

The color of roses produced in winter becomes darker, which is mainly affected by factors such as temperature and nutrient levels. Under low temperature conditions in winter, due to the increase in cytokinin content, it is not only easy to cause excessive differentiation of petals to form deformed flowers, but also easy to cause the flower color to become blue. This is because low temperature conditions are conducive to the accumulation of anthocyanin. If the pigment accumulates too much, the color of the petals will become darker. When the same variety of roses is grown in summer, the petals will appear lighter in color.
Nutritional conditions also have an important impact on rose color. When roses are deficient in phosphorus, anthocyanins accumulate, causing the petals to turn purple. In addition, the lack of medium and trace elements such as magnesium, iron, manganese, etc. will lead to the obstruction of chlorophyll synthesis, which will increase the content of anthocyanins in petals, resulting in darker petals.

Under low temperature conditions in winter, the absorption of phosphorus, magnesium, iron, manganese and other essential elements that have an important impact on flower color by the roots is reduced, which is an important reason for the darker flower color. When the temperature is low in winter, the application of animal-derived amino acid fertilizers and amino acid chelated trace elements can effectively improve the absorption and utilization of nutrients by roses at low temperatures, promote the rose’s ability to withstand low temperatures, and enhance root vitality under low temperature conditions, effectively preventing and Reduce the darkening of rose color.

Recently, South Korea has recently developed a new flower variety, the color-changing rose, which can change its color through changes in surrounding light and temperature, giving people a different visual enjoyment!

Introduction to color-changing roses

Color-changing roses are not a unique species, but ordinary white roses, after special technical processing, can be converted into roses of various colors such as purple and pink according to changes in light and temperature. Blowing in a cool and dark environment, the brightness of the luminous rose is more vivid. This product can be added with AROMA natural fragrance, so you can enjoy the fun of natural fragrance.
The power of technology is indeed powerful. It has not only changed many of our living conditions, but even the roses that add atmosphere can make it change like never before. The main varieties of color-changing roses include: temperature roses, shiny roses, ecological pearl roses, light roses, luminous roses, rainbow roses, and colorful roses, which are mostly produced in South Korea.

Characteristics of color-changing roses

The color-changing rose has a high center with curled edges, beautiful flower shape, stiff pedicels and branches, and few thorns. The grading standards are: first grade, above 45cm, with full flower buds, thick branches, dark green leaves, and no pests or diseases. Second grade, 30-45cm, with full flower buds, thick branches, dark green leaves, and no pests or diseases. Level three, less than 30cm, with smaller flower buds, thinner branches, slightly variegated leaves, and no pests or diseases.
The color-changing rose is an upright shrub, up to 2 meters high; the stems are thick and clustered; the twigs are densely covered with downy hairs, acupuncture and glandular hairs, and have upright or curved, light yellow prickles, and the prickles are covered with downy hairs. The leaflets are 5-9, and the petiole is 5-13 cm long; the leaflets are oval or elliptical-obovate, 1.5-4.5 cm long and 1-2.5 cm wide.
The apex is acute or blunt, the base is round or wide wedge-shaped, the edges are sharply serrated, the upper surface is dark green, hairless, the veins are sunken and wrinkled, the lower surface is gray-green, the midrib is protruding, the network veins are obvious, and it is densely covered with villi and glandular hairs. Sometimes the glandular hairs are not obvious; the petiole and leaf axis are densely covered with villi and glandular hairs; most of the stipules are attached to the petiole, and the free part is oval, with glandular serrations on the edge, and the underside is covered with villi.
The flowers are solitary in the leaf axils, or several in clusters. The bracts are ovate, with glandular hairs on the edges, and the outer part is covered with tomentose. The pedicel is 5-22.5 mm long, densely covered with tomentose and glandular hairs. The flower diameter is 4-5.5 cm. The sepals are ovate. Lanceolate, apex caudate-acuminate, often with pinnate lobes that expand into leaf-like shapes, sparsely pubescent above, densely pubescent and glandular below; petals obovate, double to semi-double, fragrant, purple-red to white; styles are free, hairy, slightly extending outside the mouth of the calyx tube, much shorter than the stamens.
The discolored rosehips are oblate spherical, 2-2.5 cm in diameter, brick red, fleshy, smooth, with persistent sepals. The flowering period is from May to June and the fruiting period is from August to September.

Color changing rose preferences

The color-changing rose likes sunshine, is relatively cold-resistant, drought-tolerant, and likes a ventilated and cool climate. The suitable growth temperature is 15-25 degrees. Roses have strong adaptability and are not strict on soil requirements. They grow well in fertile neutral or slightly acidic light loam soils and have many flowers. Botanical white roses are more cold tolerant than white roses.

Propagation of color-changing roses

The propagation methods of color-changing roses include seed planting, grafting, high pressure, division of the mother plant and cuttings. Generally, cuttings are the most convenient. Since cuttings are carried out in late autumn and early winter, choose strong and plump branches (5-7cm) with three to four buds. ), leaving only three to four leaves, insert the branches diagonally into a loose and moist medium, keep it at 18-25°C, with a humidity of about 80-90%, with light but not direct exposure, and roots will take place in about a month.

Cultivation of color-changing roses

Color-changing roses like temperatures between 18 and 23 degrees. The first thing to do is to cut the roots of the flowers diagonally, so that the water-absorbing part is larger and can absorb more water. Secondly, you need to cut off some every day. , to ensure better absorption of water. Also, do not soak the leaves of the flower in water, otherwise the leaves will rot, so be sure to remove the leaves soaked in water.

Color-changing rose varieties

Temperature Rose

When the temperature rose reaches the set temperature, the original flower color fades into white roses. The set temperature can be adjusted arbitrarily within the range of 18 degrees to 31 degrees, so it can be used according to different seasons and regions. The main colors are pink, blue, green, and orange. Although other colors are also available, they are generally not used much.

Shiny Rose

Glowing roses are roses that become brighter and more gorgeous than the original. The set temperature can be adjusted arbitrarily within the range of 18 degrees to 31 degrees, so it can be used according to different seasons and regions. It mainly changes from black to pink. Purple turns into blue, brown turns into green, orange turns into yellow, etc.

Ecological Pearl Rose

The set temperature of the ecological pearl rose can be adjusted arbitrarily within the range of 18 degrees to 31 degrees, so it can be used according to different seasons and regions. Pearl processing is done on the original temperature rose, and it can be used under sunlight or lighting. It’s shiny so the product appears and feels premium. Mainly start with purple flowers, and when the ambient temperature reaches the set temperature, the color of the flowers can change to pink, blue, green, orange, etc.

Light Rose

Light roses are roses that illuminate flowers with UV light or ultraviolet light to reveal a set flower color. The main flower colors are pink, blue, purple, etc. Although other colors are also available, they are generally not commonly used.

Purple Rose

Purple light rose is a rose that shines UV light or ultraviolet light on the flower to reveal the set flower color. The main flower colors are pink and blue. When exposed to ultraviolet light, it turns into purple light. Pearl processing is done on the original light rose. When exposed to sunlight or lighting, Make it shiny, so the product looks more high-end. Although other colors are also available, they are generally not used much, so if you have special requirements, please consult in advance.

Luminous Rose

After the flower is exposed to ultraviolet light or UV light for a few seconds, it will begin to glow in a dark environment. The main flower colors are pink, blue, green, orange, and purple. 3. Can be used in dark environments The lights come in different colors, especially the blue and green ones, which are more vivid and beautiful.

Rainbow Rose

Rainbow roses are rich in color, and you can enjoy a richer range of colors with one rose than the equivalent Dutch rose.

Colorful roses

Colored roses are roses with systematic color processing. The rich and colorful system colors are added with pearl processing to make them look more noble.

Conclusion: 

No matter you are a color-changing rose or not, you are still a rose. We all like you and love you. Just like no matter what we become, mother is still mother, husband is still husband, daughter is still daughter, it will not affect the lives of others because of her own changes, so if you can become better, you can try, but if you just In order to please others, please don’t be impulsive.