Growing Elite Marijuana

10-5, 4-5-3. Formulas for the fast growth
stage usually have a little more nitrogen.
Most growers use different formulas for the
different growth stages. Other growers
supplement low nitrogen formulas with fish
emulsion or other high nitrogen formulas.
Some gardeners use the same fertilizers
throughout the plant’s life cycle. A typical
formula for this is 20-20-20.
Plants growing under warm conditions
(over 80 degrees) are given less N to
prevent stem etoliation. Plants grown in
cool environments are given more N.
During flowering a high P formula
promotes flower growth. Formulas such as
3-10-4, 5-20-5 and 4-30-12 are used.
Plants are sometimes grown using a
nutrient solution containing no N for the last
10 days. Many of the larger leaves yellow
and wither as N migrates from old to new
growth.
The fertilizer should be complete, that
is, it should contain all of the secondary and
trace elements. Some fertilizers do not
contain Mg. This is supplemented using
Epsom salts, available at drug stores.
Sometimes growers prefer to use more
than one fertilizer. They find that changing
the formulas and ingredients helps to
prevent stresses and deficiencies.
However, the chemicals in each fertilizer
are blended to remain soluble. Different
fertilizer formulas may react with each
other. As a result some of the chemicals
may precipitate and become unavailable to
the plants. To prevent this growers use only
one fertilizer at each watering.
Overfertilization is very dangerous.