Spacing

Initial spacing

Initially the plants are spaced touching each other or pot thick. The plant density on the glasshouse floor or bench has to be cost effective as well as producing the best plant.

Climate and environment: un-spaced.

Temperatures: when the plants are in the glasshouse, pot thick or before spacing, keep a day-night temperature no lower than 18 - 20 °C (depending on variety) , max 16 hours light (if using lights), 700 ppm CO_2. See the tables for the planning of spacing and delivery.

• If using canes to support the plant (this depends on the planned age of the plant) put these in during transplanting or before the first spacing.
• As soon as the leaves touch, the cubes have to be spaced for the first time. Often no water has been given to this point.
   

First spacing

The first spacing changes the environment around the plant. Take care that this shock to the plant is not too big. Watch out for empty glasshouses which could have high floor temperatures and low air humidity’s.

• Except in very low light conditions aim for a cube water content of 60%. If light conditions are very low then it can be allowed drop lower.
• Plant balance: this is dependent on the variety, rootstock and single headed / pinched. A good start is important to maintain plant speed and balance.
• Spacing is a generative action as it increases the airflow and decreases the humidity around the leaves. The longer the plants stay un-spaced the more vegetative it is. Spacing on time is important to get the right plant balance and to avoid stretching the plants.