I noticed yesterday my Haworthia is starting to brown at the stem. It is only soft at the very end of the stem. Is this pot to big? How about coloration of all Haworthia? I live in Northwest Arkansas and our weather has been cooler than normal. I keep them outside on our front porch. I dusted them with Diatomaceous Earth. Our front porch faces north. We get sun only in the morning, but they do not get direct sun. Please advise me on any thing I can do to comfort them more. I use only rainwater when I water. I have a moisture meter to check levels of moisture in the soil. I am using a Terra cotta pot with a drainage hole. I have put small rocks in the bottom before I used soil. Is the pot to big? I hope you can see these pictures good enough to advise me. The 4 show are the only plants that have gone soft on me. Should I repot all of them to make sure the soil is not contaminated? The soil I use has a lot of course sand in it. Below is a picture of the soil. Then a picture of the location of my plants at 8:38 am. Please help me. I will do anything I need to do.

Its adapting to the lower light levels. Older lower fronds are first to go....

gle- My lawn came out ok enough....it's green, fungus gone, no weeds, over-seeded in early Sept.... My last thing to do this year is apply fertilizer late October/early November. Then starting next year, I'm going to try to follow this: http://forums2.gardenweb.com/discussions/4826669/a-yearly-guide-for-cool-season-grasses-from-rutgers to the letter and see how I make out. We're supposed to get a harsh winter in the northeast so let's see how that goes.

"I bumped up the sprinkler time from 7 minutes twice a week to 20 minutes every 3 days on June 16th." I don't think sprinklers are the way to water trees during the establishment phase- it's just inefficient water delivery. I would lay down the end of a hose and leave it on a slow trickle for as long as it takes to wet the soil all the way down to the bottom of the roots. And how do you know if water has penetrated deeply enough? You dig down and find out. "even when we have heavy rain, the soil is dry 6" down" So how do you expect a sprinkler to penetrate? You need slower delivery of a larger volume of water. On the roots all the way down. A sprinkler just can't give you that.