你能告诉我肥料棒的英文名字吗。谢谢!

Great! Thank you for this very useful information. You said "春天敲一根肥料棒到树旁的地里" but I do not know what 肥料棒 is. Can you tell me the name of 肥料棒 so that I will see whether or not I can buy from home depot.
We have two orange trees. After I saw your post, I went to homedepot. They recommend me "Chelated Citrus Nutritional Spray" and I bought it and sprayer for $21.69 but after I came back and read the explanation. It said that "It is most effective when applied between December and Febuary up to the time flowering is completed." It seems that we have missed the time. I really want to buy 肥料棒. If you can tell me the English name of 肥料棒, I would really appreciate it.