Plants from Phalaenopsis and Cattleya need
to achieve from 2 to 4 cm growth rank in vitro
in order to endure the external conditions
in greenhouse. MAP cultivated Phalaenopsis got
the better growth response when length was 2
to 4 cm with three roots and 1 to 8 cm long;
these values being a critical survival threshold.
The best substrate in Cattleya was the mixture
of moss-perlite (MP)