Here is a nice little discussion from here on the forum, which may help you with your problem: http://forums.gardenweb.com/discussions/3063015/growing-a-yucca-plant?n=4 Usually when I water, I go with a sort of 'gut instinct' if you know what I mean, and just learn from my mistakes, adjusting the watering to the specific plant. All plants, even of the same species, vary greatly, so a lot of the time generalized watering does not end up working so well. But those are my thoughts. Also, it is very significant to note, that there is a huge amount of wealth in information on this forum; I have found that I can figure out pretty much anything I need to know about caring for any kind of plant. Good luck!! ~palmsandsnow

It's desperate for more light & that soil is far too water retentive. I'd get a bag of perlite or pumice & mix it equal parts w/that soil (50/50 each). Pls go to the Cactus & Succulent Forum nearby (see top of page) & read up on Aloes, them needing a lot of light, fast draining mixes (soils), etc. Also plant it higher up in the pot pls. after improving the mix. Don't water often (not more than every 10 days or so). Sorry to say it will not improve w/out more light & corrected soil. Expose it to more light gradually. What's that stick or branch or woody stem?

Not sure what Mike is referring to. Irostome, what is your general location? Do you know where the Yucca was grown? The spots look exactly like what is called Yucca Leaf Spot, one of the common fungal disorders caused by a couple of different fungus organisms. Please put away your magic potion and research a proper fungicide, a real one. Does this plant live inside? Let me know and I'll find some possible fungicides for you.

Oh wow spamming