HVG Germany: Hopfen


Rootstock and Shoots

1. Rootstock
wurzel_bild1The parts of the plant above ground are cut off every year. Only the rootstock remains from which the young shoots develop annually. The rootstock is the nucleus of the hop plant. It is about 30Ð40 cm long and 10Ð15 cm thick. The surface is rough and bent. The bark is generally dried and brittle.

The interior of the healthy rootstock is yellowy-white with no brown discolouration. The rootstock stores the reserves.

In the autumn the nourishment wanders from the bine back into the rootstock if this has not been cut back too hard. In the spring the young shoots are nourished almost completely from this reserve to reach a height of about 75 cm.
The rootstock forms from the rhizome which has been planted in the ground. From this the main roots or shoots grow downwards. At the place they were originally planted, there are 6–10 of them about 2 cm thick and more than two metres long and they branch out very quickly.

2. Shoots
wurzel_bild3A special kind of root grows from the part of the bines underground. These are the so-called summer roots. They can be compared with the adventitious roots of cereals. Their development depends on the weather conditions, on the type of soil, how the ground is worked and fertilized. The task of the summer roots is to draw in surface water and particularly the nourishment in the top soil.