Manuel, it isn't "down". They had a medical situation about six weeks ago and had to suspend business. They hope to have an auction beginning this coming weekend and adding new plant material. My comment is directed at anyone who wants to join the group order. Things move quickly... 24 ~ 36 hours and the order will be placed. If you haven't looked over their plants material, it could be an overwhelming task at the last moment. Please keep in mind: 1. NO CITES PLANTS, 2. You'll want an order sheet from me, 3. Payment using Paypal® and their USD/€ conversion with Friends/Family IN EUROS., 4. For the most part we usually only order Haworthia. If you don't have a Paypal® account and/or don't have Euros as a currency, you'll have to make some adjustments. These aren't my rules; they are rules made by STC and/or Paypal®.

Where are you located? I wonder if these had some cool/cold damage during shipping, or more likely the brown/yellow is a result of them being removed from tissue culture (high humidity, "perfect" conditions) and not acclimated slowly enough to real world conditions. They seem hefty enough, but there are a few things I would change. Hard to tell from the photo but to me your mix looks a little "heavy".....too many fine particles. I would loosen the soil up by adding a bunch of perlite and also some fine bark pieces (you can buy orchid mix and mix it in or even some regular small pine mulch pieces). This gives a soil mixture that holds moist but contains a lot of air too. Remember these guys are naturally growing in the tropics, along and on trees where mix is very loose and airy. Second, at least initially I would put each pot in a large clear ziplock bag......leave the top open but it will still raise the humidity around the plant a bit. Once they root in well and get growing you can remove this bag. I routinely do this with new cuttings too. Good luck, they are one of my favorite houseplants. Note that it is normal for very white areas of the leaves to brown easily, especially when conditions are not the best (like inside in winter)./

A few thoughts from a non-professional. The "process" takes at least two years before you should be buying anything at the retail level. No reputable dealer should sell you what the trade calls TC liners (or starters), which is what the process has produced after about 1 year. But it happens. The reasons TC fails for a cultivar likely fall into two classes: plants where isolation of bud tissue is difficult (some plants are simply finicky; I suspect Midnight Oil may be one) and plants where the buds do not reproduce with a high percentage of "true to type" offspring. Sometimes that's for variability in variegation (such as 'Goodness Gracious') and for oddity in form (those with "congested" central veins like 'Stitch in Time' can be a problem, I believe). Streakers are a special case for this, of course, as the instability generally leads to the whole gamut of possibilities in variegation. I was pretty shocked when 'Ice Age Trail' actually went to market as a TC plant, but I guess they figured they could still sell all those 'Big Daddy's. As to what goes into TC, the market is a bit odd right now, as it's all pretty much shopped out to production labs based on demand. Walter's Gardens, once one of the big daddies in generating new hostas, doesn't have much of an internal development program any more, but they still produce old-school hostas for the wholesale market. Mark Zilis's newest incarnation does TC for a few partners (Solberg, Avent, maybe some others). Rob Mortko sold his retail business, in theory so he could focus more on the lab/TC side, producing for retailers like Josh Spece, perhaps in direct collaboration with hybridizers (e.g. Don Dean). Other hybridizers and retailers work out production directly with smaller TC shops. The Europeans have their own routes, but then only get their new plants into the US in small batches. All of this makes the yay/nay question interesting. If a retailer sees (or finds) a plant they want to sell, then they have to make it happen. I think no one wants to see a repeat of what happened at the end of the Q and Z days, where Mark was, frankly, producing a whole lot of new cultivars of little merit. We'll be stuck for a while, though in the situation where North American and European producers/growers discover identical (or near-identical) sports coming out of TC and then registering/producing/releasing both. Hybridizers face an increasingly narrow market in finding truly novel, garden-worthy plants to release, and an uphill battle in getting someone to produce/sell them. For interest, this could be the best quick on-line reference for TC in hostas: http://www.plantsgalore.com/care/hostas/Hosta-propagation-TC.htm

This is the best information I have seen on that subject. https://www.exoticrainforest.com/Philodendron%20spiritus-sancti%20PC.html It's a lot of information and to be honest, I find it a bit overwhelming to fully comprehend. But maybe you will be able to take something useful from it. Whenever there is a plant with this much contention, I would try to purchase only from a very reliable source. NSE Tropicals is a leader in that category. Or anyone that can prove they purchased it from her would be a good alternative. Best wishes and if you do purchase one, give us an update! I'm always hoping to learn more. I just got an a juvenile atabapoense and it's an adorable plant.