Hydrangea 'Annabelle' (Hydrangea arborescens) - garden hydrangea - 17 cm pot - Height 50 cm

Yes, that is precisely one of the great strengths of the Annabelle panicle hydrangea (Hydrangea arborescens 'Annabelle'): it blooms on the current year's wood, not on old stems. You can therefore cut it to 20 to 30 cm above the ground every spring without sacrificing a single flower. On the contrary, this short pruning stimulates the growth of new stems, which are more numerous and stronger, and will bear even larger flower heads. The flowering then continues uninterrupted from June to September, and the shrub can reach a height of 1.2 meters in a single growing season.

The Annabelle arborescent hydrangea belongs to the species Hydrangea arborescens, native to North America, while classic garden hydrangeas are Hydrangea macrophylla, native to Japan. The fundamental difference lies in their floral biology: the Annabelle blooms on new growth, making it immune to late spring frosts that can destroy the flower buds of macrophylla hydrangeas. Its color is exclusively white, regardless of the soil's pH, unlike macrophylla, which turn from pink to blue depending on acidity.

T'he Annabelle panicle hydrangea is 'one of the most adaptable flowering shrubs in terms of 'exposure. It 'thrives in full sun as well as 'in 'partial shade or even in 'quite dense shade, making it an ideal choice for tricky areas of the garden. In full sun, ensure regular watering and keep the soil moist to prevent the flowers from wilting prematurely. In partial shade or under large trees, its flower clusters will be slightly smaller but 'will last longer. It is particularly valuable in bright woodland settings or at the foot of a north-facing wall, where few 'shrubs flower so profusely.

T'Annabelle panicle hydrangea ac'modates most soil types found in French gardens, whe'ther they are clayey, loamy, or slightly sandy, provided they'remain moist and well-drained. It prefers soil rich in organic matter: incorporate mature compost or well-rotted manure at the time of planting to promote establishment and vigor. Unlike macrophylla hydrangeas, its flower color does not depend on the soil pH: the flowers remain white regardless of the'soil acidity.

T'Annabelle panicle hydrangea is a remarkably hardy shrub, able to withstand temperatures down to'as low as -25°C when planted in the ground without special protection. The older stems may freeze during'very severe winters, but the plant regrows vigorously from the base in spring, often even more vigorously than before. However, it is not very drought-tolerant: its large leaves lose a lot of water through transpiration, and its flowers'quickly wilt if the soil dries out. During heatwaves, abundant evening watering and a thick layer of mulch around the base are essential.

T'he Annabelle panicle hydrangea, sold in a 17 cm pot, can be planted practically all year, except during periods of intense frost or extreme heat. The best times remain spring (March to May) and 'autumn (September to November), which allow the plant to 'establish itself in the ground without thermal stress. Dig a hole twice as wide as the root ball, loosen the bottom, and incorporate compost. Place the root ball level with the ground, water thoroughly to eliminate air pockets, and immediately apply a 10 to 15 cm layer of mulch.

Yes, 'Annabelle panicle hydrangea grows very well in a large container on a patio or balcony, provided you choose a pot 'at least 40 to 50 cm in diameter to allow the root ball to develop. Use a well-draining but slightly moisture-retentive substrate, consisting of potting soil mixed with a little compost. In a pot, water requirements are significantly higher than 'when planted in the ground: plan to water almost daily in summer, especially in full sun.