The experiment was conducted to determine the effect of phosphorous fertilization on growth and production of Indian pennyworth (Centella asiatica L. Urban) in the high altitude (1,500 m above sea level/asl). This experiment was carried out at Gunung Putri experimental station Balittro,Cipanas, Cianjur in October 2008 until April 2009. The treatment was laid-out in a Complete Randomized Block Design and consisted of single factor with 5 replications. The factor was P2O5 fertilization i.e. 0, 30, 60, 90, and 120 kg P2O5.ha-1. The results of the experiment showed that P2O5 fertilizer significantly increased the total leaf number, leaf length, the total flower number, leaf thickness of mother plant and production components at 6 month after planting. The highest production (1.34 ton dry weight.ha-1) was achieved by 60 kg P2O5.ha-1. The optimum dosage to improve dry weight production of Indian pennyworth in high altitude was 65.84 kg P2O5.ha-1.Key words: Centella asiatica L., phosphorous fertilization, production
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