Six fertilizers providing N in different forms were incorporated preplant at rates of 400, 800, and 1200 mg N/liter of pot volume for production of Ficus benjamina (L.) plants. Inorganic N status of the media was determined biweekly, and total plant dry weight and N content were determined at the conclusion of the study. Length of time until inorganic N levels in the media dropped below a selected 0.12% level ranged from 94 days for the nitrate-N source to greater than 182 days for the resin coated-N fertilizer. Increases in the rate of N applied of 100%, from 400 to 800 mg N/liter, and of 50%, from 800 to 1200 mg N liter, resulted in increases of 47% and 25%, respectively, in the length of time media N levels remained above the critical level. All N sources produced plants of similar dry weight, whereas only the nitrate-N material gave a lower plant N content than the other fertilizers. Increasing N rate increased plant N content but decreased plant dry weight.