Generally, replacement planting can be carried out from November until the spring, ending in April. Several factors can modify the optimal period for replacement planting, such as the type of vine being planted, the type of soil and the climate.
2.7.2.b What is the best time of year for replacement planting?
Which planting period has the best success rate?
The best time to plant will depend on the planting material, the local climate and the soil type. Generally, it is advisable to plant as early as possible so that the young plant develops an adequate root system and is robust enough to withstand extreme conditions (drought, harsh winters). Planting after April, when temperatures are higher and there is not enough time for the plant to develop before summer, is not recommended. If the soil is sandy or gravelly, it is probably best to plant in the autumn. On the other hand, if the soil is silty or clayey, it may be more judicious to plant in the spring in order to avoid an excessive accumulation of water and asphyxiation of a still under-developed system.
What types of plants are best suited to winter planting?
Plants in small biodegradable pots should preferably be planted between September and mid-December, provided they have lignified, which gives them more resistance to cold temperatures and frosts. The same applies to traditional rooted grafts if the soil is well drained (or sandy) and the local climate is suitable.
What types of plants are best suited to spring planting?
Traditional grafted plants can also be planted in the spring, until April, if the soil retains water (high percentage of silt and/or clay).
Container-grown plants also called "superpots" can be planted in the autumn as well as in the spring. They are grown in potting soil and have a functional root system, justifying the possibility of spring planting as well as traditional autumn planting. Large vines are also available, characterized by the length of the rootstock (> 30 cm). They can be planted in either the autumn or the spring, depending on the production method (traditional, in pots, superpot).
At Château Latour, the majority of the plants are rooted grafts. Plants in pots require more storage space, equipment, labour and planting time. They are generally too time-consuming, especially for a large production area.