Also, make some holes on the SIDES of your styrofoam cups near the bottom. Holes on only the bottom prevent the water from draining out and allow the roots no aeration at all. That can kill plants. They need air as much as they need water. See the link below for a long discussion about plant roots needing air, particularly plants in containers (and that includes seedlings that you'll plant in the garden later). Here is a link that might be useful: Container soils and water in containers

Sticky can sometimes be from not letting the paint cure long enough. I bought some paint for BM that cures to a very hard durable finish, but it does it in about a week, and before that it's tacky and you can put finger prints in it. It also says to wait 12-24 hours between coats. I also have used the Low VOC Acrylic from SW. That is some neat stuff, no smell and cleans up really well. Also needs a bit more time to fully cure. I used in on the trim, doors and wainscoting in the entry way that gets a lot of abuse. Very happy with the durability. I think this was the easiest to use paint I've ever come across. Was painting a dark brown using a brush (over a mustard yellow) and it covered wonderfully and self leveled nicely. I was told it is used a lot in high traffic commercial applications. Their pre-catalized Epoxy paint also dries to a very durable finish. I use it on the ceiling where I need to scrub (from having wood heat). Nothing sticks to it once cured, including more paint. Directions say if you wait more than 72 hours, you have to sand before applying a second coat. Both of those aren't cheap paint though, think they retail for near $100 a gallon.

You know, I never considered white, probably because I have color everywhere. That is something to consider. I'm not sure about the green ceiling though. Of course I've never had color on my ceiling before. I appreciate your suggestions. And just when I thought I had it figured out.

A properly designed curbless shower DOES contain the water! The important part is "properly designed". The best waterproofing that exists can be all for nothing if the shower underneath it is improperly built. That goes for curbed or curbless. Be sure the pre-slope is correct, and correct for the materials chosen. Be sure the interface with the drain is correct, and no weep holes are blocked. Be sure the curb is built correctly, and detailed correctly. The details Behind the waterproofing are just as important as the waterproofing. And the framing behind those details is included in those things that not enough people pay attention to, until it is too late, and they have a wavy tile installation because the walls were framed poorly. You won't be using any contrasting grout with wavy walls!