How To Plant Pechay?

What is the amount of ammonia should be putted on a pechay (chinesse cabbage) plant?

• need the answer...really need it!! =) and how old should be the pechay plant?

• Answer:

  Don't put ammonia on any plant unless you want to kill it. A table spoon of ammonia nitrate can be worked into the soil around the plant. Household ammonia is good to poor out from the plants to keep critters away. Too close and the fumes will burn the plant or kill the feeder roots. For cabbage, try moth balls to keep it worm free. Size? The size of a lady's fist, more or less. Hope that helps.