  Nowadays, many vegetables are grown insidegreenhouses in which environment is
controlled and nutrition can be supplied through water supply using electrical
pump, namely fertigation. Dosage of nutrition in water for many vegetable
plants are also known so that by controllingwater supply all the needsfor the
plants to grow are available. Furthermore, water supply can be controlled using
electrical pump which is activated according to theplants conditionin relation
with water supply. In order to supply water and nutrition in the right amount
and time, plants condition can be observed using a CCD camera attached to image
processing facilitiesto develop a speaking plant approach. In this study,
plants development during their growing periodare observedusing image
processing. Three populationsof tomato plants, with less, enough, and exceeded
nutrition in water,are captured using a CCD camera every three days, and the
images were analyzed using a developed computer program for the heightof
plants. The results showed that the development of the plants can be monitored
using this method. After that, the responseof plant growth in the same
condition was monitored, and the responsewas used as input for the fertigation
system to turn electrical pump automatically on and off, so the fertigation
system could maintain the growth of the plants.
