My green and white, spiky-leafed plant has black splotches on its leaves. What do I do?

I don't know the name of the plant, but it has many long, green and white spiky leaves. I water it just a bit, every 2 days, when the earth in the pot turns from black color, to dark brown. I have been mixing a teaspoon of MiracleGro flower and plant food with the water. Approximately 2 weeks ago, black splotches began appearing on random leaves in random locations. I looked underneath the leaves which were also black (it seems to go through and through), but I did not see any bugs. Could this be a fungus of some sort? What should I do?

My green and white, spiky-leafed plant has black splotches on its leaves. What do I do?
If it looks like this photo then it is a airplane/or spider plant.

If not take a leaf to a nursery and ask them.

Since I don't know what the plant is I can say what is wrong. Over watering usually produces yellow or brown spots. But yours has black splotches.



Photo

http://davesgarden.com/pics/SCShopgirl_1...

http://images.search.yahoo.com/search/im...
Reply:It sounds as though you're describing an "airplane" plant. They have long, thin leaves that have a lengthwise white stripe (or two) on them. Usually, if this plant starts to get black splotches, it's being watered too much. Airplane plants can take a lot of abuse, so I'm a little surprised that it's responding this way to water; however, if you're letting it sit in water for any length of time after being watered, that's probably the culprit. Allow it to sit in water no more than an hour after watering, then make sure it drains well so that the roots don't drown and compromise the plant's vascular system.



Good luck!