Have you looked in the dollar stores for drinking cups. I use small styrofoam coffee cups which have holes poked in the bottom. The cups are 2 1/2 inches in diameter and 3 inches tall. I pay $1 for 25 or 6 cents apiece. I also use the colored 16 oz plastic drinking cups for larger plants. I like both of these better than pots and they are cheaper. These are my main pots. I do also reuse the 4 and 6 packs I buy plants in and I do buy some 6 and 9 packs from my seed catalogue occasionally. They all get the bleach treatment at the end of the season I wash them in a mild bleach solution and use them again the next year but the styrofoam ones could also be crushed and put in the bottom of large planters to save on soil and still give drainage.

Forcing myself to write that post made me remember it was Romeo plant food. I found the website. I see the red and the green bags and then one more of something I never saw before. Here is a link that might be useful: link to romeo plant food

I'd suggest you might pick two colors - either on the opposite end of the color spectrum or two adjacent colors which are complimentary. For something like this, it would look better to get plants of similar height. It wouldn't look good to have one at 40" and another at 23". If you use two colors, use masses ( groups of at least 6 plants together - plant in a zig zag rather than a straight row for a better look!) and alternate them. Go with the colors your friend would like - I personally would like either purple and hot pink (fuchsia) alternating or maybe purple with yellow( opposites on color spectrum) and think that might have more impact than just one color, but that's only my opinion! Dark daylilies seem to pop more when they are contrasted with another color. They recede into the background if planted alone. I'd think in zone 8 you might want to avoid dormants and go w/ EV or SEV.

I bought mine at a grain store "out in the country". People use it to feed their animals to give them a shiny coat and it is good for digestion. I pay $0.49 a pound where I buy it. I think flax seed is flax seed. I think there is just different qualities (human & animal). If you are just looking to make some for yourself and not to sell, you can find flax seed at any grocery store in the baking aisle. I know my Walmart carries it. I searched online to find mine, before I found the grain store, I just googled craft flax seed and tons of different places came up. Depending on where you live, try an livestock feed store or the grocery. If all else fails, I can get some for you and ship it to you. I have no idea how expensive shipping would be though.