Where to sow
Use rain water for watering or so called soft tap-water
(max.10oDH). When using inert substrates such as lava or
rock-wool is it wise to add each time when you're watering a small
quantity of fertilizer.
'With the use of tap-water it becomes necessary to lower the pH level to pH 5,5. The frequency of watering is at best between 5 and 10 days; it depends on the location of the greenhouse and the weather conditions. In any case do not water if the substrate is still moist! Check this before sunrise. Water only if the weather forecast is favorable, the plants have to be dry within a couple of hours.
A fertilization method for inert substrates have been utilized for years with success now is the recipe of Hans Wortel (Neth) (See Succulenta nr. 8 and 9 of 1982) who uses two solutions A and B. The composition is as follows:
Fill a barrel with a capacity of approx. 25 liters with 20 liters tap-water add 500 ml Nitric acid, then the 3,2 kg Nutriflora T, stir firmly during 10 minutes and add the 40 gram FE DTPA . Stir again after 6 hours for 10 minutes. After 24 hours the solution becomes clear and can we transfer it into easier handling bottles. Remove the sediment from the barrel. Stored in dark and cool place the solution can be kept for approx. 6 months.
Fill a barrel with a capacity of approx. 25 liters
with 20 liters tap-water add 500 ml Nitric acid, then the 4 kg Nitric lime
and stir firmly until the solution becomes clear, and than we can transfer it into easier handling bottles.
It is advisable to add 3 ml A and 3 ml B for every liter of water when watering.
The above mentioned compositions may also be used with the usable substrates. For convenience sake also commercial nutritious salts are available. These can also be used, provided with care, for the inert substrates.
all cases be careful for shortages in the nutrition
such as minerals and spore elements.
Copyright © 2003
email: Piet van der Laken