Bulbifer dying off
My Amorphophallus bulbifer plants are not doing well at all. They are young plants (bulbs about 1" across). The stalks are about a foot high and the leaves have been turning brown and falling off. However, the plants continue to send up new leaves from the base.
Care: I have never fertilized them. They are in shade, but outside in the HOT Texas heat (100 degrees F lately) and high humidity. Soil is kept moist but not wet. Pots are plastic and about 2x the diameter of the bulbs. Soil is well-draining (I mixed 1/3 Miracle-Gro with 1/3 perlite and 1/3 vermiculite).
Can anyone help?