I also make sure no water gets into the crown of the leaves and I drain thoroughly. I am in shock if this is root rot. Can I be under-watering?

Water when dry. if it takes 3 weeks to dry out then you need a mix that drains faster. Generally water once a week but not if is wet already.

It might like more light too.

Three-to-five weeks seems a long time to me, depending on where you are. I have a lot of Sans--Kirkii pulchra, Masoniana, Boncel, Cylindrica etc--and most are relatively large. They are all in plastic pots with drainage holds, in a mix that is EQUAL parts C/S soil, pumice and manna pro poultry grit. Sometimes I throw in a handful of sifted perlite too. Even in hot southwest FL, I water about every 2 weeks (10-16 days, depending on when they are dry).

So -- I suspect, as Karen said, that your mix is too fine and is holding too much water around the roots (possibly rotting them). In my experience, you can put Sans much closer to sunlight. Mine get about 2-4 hours of sun every morning. Also, as Karen said, I would reduce the fertilizer. I don't fertilize much -- maybe twice a year. There is a thread here in the Sans forum that you can find from Stush who writes about using alfalfa and potassium tablets with Sans to stimulate root growth (and leaf growth) in growing season. I would search for that and study it. I have used that information with outstanding results.

After my many failures, I would never recommend using chemical fertilizer. The Alfalfa is a natural fully safe to use and suppose to be a growth stimulant. If you can find it. I found Alfalfa Pills in my local Wal-Mart's on clearance sale. For people use but simple to use with my normal watering routine. I didn't use any for over a year and had a major loss the past winter season. I mixed up a batch of regular chemical fertilizer (weak) with Bayer 3 in 1 with Bonide Captan to control a possible plant infection. Most of my hahnii did poor or died and my larger ones did ok. Lucky my prized futura 'Asahi' was not effected by this. I should take my own advise of using natural simple mix with alfalfa. I was thinking of using a simple vitamin pill ever so often for trace elements but so far never did.

I seem to never have problems until I experiment with stuff. But where's the fun suppose to be?

As far as soil concerns, I have seen sans grow well in regular potting soil and poorly in high gritty mixes. It mostly depends on your growing conditions and how you grow them. Myself, I need a more gritty mix for best growth in the long run. Also some kind of sans seem to grow better in regular potting soil than gritty mix.

Thanks everyone! Will follow your advice and cut back on the fertilizing and fix the medium. Will move it closer to the light also. I appreciate the help!

I use about 50/50 C&S mix & pumice; they drain really well together.

I'm not a gritty user, didn't work well for me when I tried it on my Hoyas. Frankly, on my Sans. I recycle other C&S mixes I've used from other plants. I've found that as long as it's fast draining, the Sans. really don't care what it is.

Thanks Karen, yesterday I repotted it in a 50/50 mix of C&S medium and perlite and moved him closer to the window with filtered light from a west facing window.

Grannymarie, I agree with Karen on the "repurposing" of soil mix for Sansevieria. If I am repotting multiple plants (Sans), I often reuse the old mix with a little new mix. She is right -- Sans don't care much about what they are potted in. What mine care about is: good drainage, NOT being over-watered, and getting enough light. I don't agree with people who think Sans are a shade plant. Mine get "bright light" outside in Florida -- they are on a covered lanai so not much direct sun, but LOTS of indirect sun, and they do well.

Thanks Robin, I had the plant on a stand 6' away from a west facing window that had the blinds adjusted in the afternoon to filter the strong afternoon light. I now have it on the plant stand right in front of that window so it gets more light but still filtered in the afternoon. I wonder if I was under-watering it as well since I let it stay pretty dry between waterings.

Pic after repotting.

Grannymarie, your plant looks happier now. About watering....I use skinny wooden skewers on any plant that is in part soil, to see if the soil is still wet. You can't tell by looking. Just stick that skewer in, let it sit for a minute and pull it out. If it's warm and soil is "sticking" to it or it seems damp, don't water. When it comes out cool and dry (and has been at the bottom of the pot), water.

I let my Sans get completely dry between waterings, and I have killed more than I want to admit by not doing so. In general: 1) Most of my Sans are in relatively large PLASTIC pots, from 6" to 12"; 2) they are outside all the time, in SW Florida which from June through Sept. is high 80s / low 90s and HUMID; 3) they are in bright light all the time; 4) Most have pea gravel top-dressing, which helps retain moisture in the pot, I think. I generally water at the earliest every 10 days, but more often it is 14-16 days from watering to watering. Again, use that skewer.

And again, I cannot recommend highly enough Stush's practice of using an alfalfa/potassium mix. (Just search for Stush/alfalfa/potassium up top and you will find it.) It has stimulated both root and leaf growth beautifully. (Thanks, Stush!) I have a large, variegated Sans Masoniana that had 4 leaves when I bought it and after using Stush's vitamin mix, it has grown 2 additional leaves, both large and healthy, though not as variegated. I love it. I am going to experiment with it on a couple of other plants in a C/S soil/perlite mix and see what happens. Good luck with your cute Sans.

Robin, I have used wooden skewers for orchids, Don't know why I never associated them with other plants. Will start using one for my Sans. I will also look up the alfalfa/potassium mix. Thanks.

I've been looking around for C&S mix instead of the MG cactus mix but what I'm finding either has peat humus, peat or fertilizers. Can anyone suggest a C&S brand that is safe for sans?

I ordered potassium and alfalfa pills. How often should I feed with this and is it ok to not water the plants first to protect the roots or is this mild enough to use the fertilized water on the dry plant?

I used one pill per gallon, then use the water like you would normally would. I have used the C & S mix of MG with no bad results mixed with perlite. I would cut back off on the potassium with the use of the fertilizer used in the mix.

Great, thanks!