Fenghua rose is a newly developed variety of rose that was successfully cultivated through hybridization. It received provincial recognition in Shandong in 1998, marking its official introduction as a promising horticultural species. This rose is known for its adaptability and wide geographical suitability, thriving in regions where the annual average temperature ranges from -7°C to +15°C. However, it is sensitive to extreme temperatures, with risks of freezing when temperatures drop below -28°C and heat stress when exceeding 35°C.
One of the most remarkable features of Fenghua rose is its high flower yield and frequent blooming cycle. It produces large, heavy flowers with a rich purple color, resembling peonies in appearance and earning it the nickname "peony rose." Each single bloom measures about 8 cm in height and weighs more than 3 grams, with some reaching up to 4.5 grams. The fragrance is pure and strong, making it ideal for essential oil production. Additionally, it has excellent disease resistance and strong three-dimensional flowering ability, making it a valuable plant for both ornamental and commercial use.
Fenghua rose is typically propagated through grafting using cuttings or other rose varieties as rootstocks. Grafting can be done in spring, summer, and autumn, with bud grafting being the most efficient method due to its high survival rate and ease of operation. The best time for planting is before the leaves fall in autumn or just before new growth begins in spring. Spring planting should occur after the soil thaws but before the buds start to open, usually between late February and early March. During this period, the roots are active, and the plants can recover quickly from transplanting. Summer planting is best done during the rainy season when the soil is moist, though it requires careful timing to ensure survival. Autumn planting is ideal from mid-October to early November, when the plant is entering dormancy and the roots can heal before winter sets in.
In terms of fertilization, Fenghua rose benefits from a balanced mix of nitrogen, phosphorus, and organic fertilizers such as urea or diammonium phosphate. Proper nutrition is crucial from budding to flowering, as insufficient nutrients can lead to small, weak blooms and reduced oil content. If the soil becomes dry during this period, irrigation should be provided before flowering, but watering should be avoided once the flowers begin to open to prevent damage.
For pest and disease control, common issues include rust, which can be managed by spraying lime sulfur at 3° to 4° Baum in early spring. During the growing season, 25% triadimefon diluted to 1000 times can be used to combat fungal infections. Insects such as the yellow beetle, rose sawfly, and longhorned beetle also pose threats. Control measures include soil turning in winter, weeding, pruning, and protecting natural predators like ladybugs and ants. In early August, 2.5% Decis 2000 times can be applied to manage sawfly larvae effectively.
Overall, Fenghua rose is not only an ornamental plant but also holds significant value in agriculture, medicine, and the fragrance industry, making it a versatile and economically important species.
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