GROWING GRAPES ORGANICALLY: THE YEARLY
CYCLE
In the months of October and November, it is time
for the vineyard's autumn facelift. The dead vines must be pulled up, as a
preventive measure for disease, and some wires and posts will need replaced. We
must also perform routine maintenance of the border areas and make new holes
for the young replacement vines to be planted in spring.
Ploughing the soil into mounds around the base of
the vines, known as chaussage, helps to protect them over the winter. Vigorous
pruning begins in early December to limit the output to 30-35
hectolitres/hectare, this ensures the long-term health of the vines. The
pruning process ends in March with the young plants - as the saying goes, "Trim
early, trim late, but there is nothing better than trimming in March." The long
stems are cut leaving only two future buds. The trimmings are nowadays ground
and left on the soil, supplying up to 1/4th of the nutritional needs of the
plant.
At the end of March or beginning of April, with the
warming of the soil we organically fertilize along the rows. In order to
optimize the biological dynamics, the organic manure, the trimmings and the
previously seeded grass are buried with the soil removed from the foot of the
vines in a process called decavaillonnage. This is a highly technical procedure
by which the vine stocks are uncovered as the earth mounds that offered winter
protection are ploughed into the rows between the vines. This also reduces the
risk of "French roots", meaning too close to the soil's surface. We finish by
doing a final weeding by hand in order to do the best possible job.
In May, we do ébourgeonnage: some vines might
overextend themselves, and when there are too many buds developing, these will
need removed one by one. Our situation, on the slopes of the Dentelles de
Montmirail makes the environment dryer than in the plain, minimizing the need
for interventions or treatments. For oidium, which is rare here, sulphur from
vegetal sources works very well needing only two or three light applications in
the whole season. It also supports and improves the blossoming process. Mildew
is also relatively rare here; various copper-based mulch mixtures are used to
keep it in check, although we are limited to 4 kg of copper ore per hectare per
year. In light of the excellent biological equilibrium that can be found on the
estate, no insecticides are actually needed. Before any intervention in our
vineyard, we carefully weigh up any potential consequences on the ecosystem. We
are very pleased that over the last 20 years, since going more organic, the
amount of insects and birds has greatly increased in a dramatically visible
way.
Towards the end of June, several passages of the
griffon (light airing plough) are necessary in order to lighten the soil and
control the weeds from competing with the vines. Other work, done by hand at
this time includes the removal of undesirable young shoots and trimming and
tying up the vines in order to expose a maximum number of leaves and grapes to
the sun. July is the last month we work on the soil. Le sarclage is a
particular plough which runs a horizontal blade 5 cm below the surface,
literally slicing the roots of the weeds. Young vines also keep us busy, they
need tied and their small unripe grapes need removed (young plants can get worn
out in the long-term, if they are allowed to produce grapes before they are
mature).
At the end of August, it is time to sow the green
fertilizer (the winter cover of fertilizing grass) in order to enrich the soil
and reduce erosion. |
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