be looking for a pH of 7. It should tell you
this on the bag. Going above or below this mark
can cause your plant problems during growth.
Small pH meters (Figure 5.18) can be bought in
most gardening shops and can be used to measure
the overall pH of your soil.
Figure 5.18 - This is a picture of two cheap pH
meters that can be purchased from most grow shops.
NUTRIENTS
The three major nutrients that are found in
soil are Nitrogen, Phosphorous and Potassium or
NPK for short. NPK can come in two forms - with
the soil or as a stand-alone fertilizer
(usually in a bottle). When you look at the bag
