1. Variety characteristics: Hydrangea conica only blooms on the new branches that grew in the spring of that year, and it is also the latest variety in hydrangea family. The flowering period can last from the end of June to September, and you can continue to watch the retro colors in the later period at 10. The cone hydrangea is higher than the big hydrangea, and the height of most adult plants can reach 1.2- 1.5 meters. The relatively short and compact varieties are "Thunderbird" and "vigorous lime", and the height of the plant is about 0.9- 1 m.
2. Temperature conditions: Hydrangea cones can withstand the low temperature of -30℃ in winter, and can overwinter outdoors without protection in the easternmost part of Heilongjiang Province in China and the northern part of the United States adjacent to Canada. Can withstand the high temperature of 40℃ in midsummer, without shading in Zhejiang. Sugar garden, the actual temperature under exposure exceeds 50℃. When the leaves of other big hydrangeas are burned and the branches are down and out, the conical hydrangeas can bloom gracefully without fear, and the dark green leaves are full of vitality.
Conical hydrangea
3. Color change: In midsummer, the buds and flowers of all varieties of hydrangea are new green, and the petals gradually turn white after unfolding. After autumn, the temperature difference between day and night increases, and some varieties will turn gray-green and slightly pink in the later stage, such as "white jade" and "active lime" in the above picture; Some will turn pink into burgundy, such as "Xia Mei", "vanilla strawberry" and "rouge diamond". The picture below shows the color change of "Rouge Diamond".
In addition to the variety differences, the color changes of the same variety in different regions will be different, which is related to anthocyanins in cells. In the northern low temperature area, after entering the late autumn, the temperature difference between day and night is large, and it is easier to synthesize and accumulate anthocyanins, thus showing a reddish color. In the south of Jiangsu and Zhejiang, the cone hydrangea can only appear light pink in the later stage. June165438+1October, after the cut hydrangea is naturally air-dried, the crude fiber can keep each petal in its original shape and turn it into a dried flower to continue to appreciate.
4. Lighting conditions: Compared with large hydrangeas, conical hydrangeas need more sunshine time. If the sun is shining, the branches and leaves are dark green, the inflorescences are full and the flowers are huge. If the sunshine is insufficient, the branches are too long, the flowers are few and the flowers are small. Therefore, it is suitable for planting in sunny places without shelter all year round.
Conical hydrangea
5. Pruning method: Due to the flowering characteristics of new branches, they can be pruned after the flowering period in autumn and winter and before the germination in early spring (that is, between this year 10 and next March). In order to control the plant height, strong cutting can be carried out before germination in early March, and the old branches flush with the soil can be cut off. If there is enough space, you can cut it in the middle after flowering and keep some strong branches. Conical hydrangea is the only hydrangea variety that can be turned into lollipops by pruning. After the flowering period in autumn and winter, keep the thick main branches and cut off the redundant branches, and the lollipop hydrangea can be cultivated in about 3 years.