My N. hirsuta has a flower stalk started but has yet to produce a pitcher. The vine is about 3 feet (a meter) long with 2 dozen leaves. Am I safe in assuming the lack of pitchers is because the plant gets too much fertilizer in the water? This area of my greenhouse has numerous orchids and the Nepenthes gets sprayed with weak fertilizer once or twice a month. I assume the humidity, air movement, and light are correct if the plant is flowering.