you need to contact the places that sell dry. and some might be able to get you fresh in season. your local store can purchase them in season. big cities have fresh veggie wholesalers maybe a market where you can get them. my local super market had tons of fresh red caribbean habs or scotch bonnets a couple of months ago. I am sure you can get them now from the right wholesaler. make some phone calls around and someone will know who to call. what is your nearest big city. the produce wholesalers will sell cases cheap to anyone. your local supermarkets will know who to phone. or look in the yellow pages for vegetable wholesalers in the big cities. that is their business getting you fresh veggies like hot peppers when you want to buy them. dont worry they can get most anything. If you dont have a big city. I would talk to people in Texas and New Mexico who are in the hot pepper business. or from the caribbean you might try Miami wholesalers.

new gardener looking for free ghost pepper, habanero and cayenne pepper seeds

Well, stuff happens. I have Fish peppers I ordered from a very reputable seed supplier. Last year the seed I planted created a small, highly variegated plant with a small crop of beautiful hot variegated peppers that took a long time to turn red. This year another seed from the same packet produced a huge, incredibly productive plant that always has a ton of peppers on it, but they have no heat at all except in the seeds, and they ripen all the way right away, and the plant has almost no variegation in the leaves, and maybe one pepper in ten shows any striping.

Limiting the volume of soil limits the size of the plant. Limiting the size of the plant limits the amount of peppers it can sustain. Fish fertilizer is very high in N relative P and K and this triggered the plant for foliar growth, but too much N can prevent the plant from switching to setting fruit when it normally would. People who choose to overwinter generally do so by yanking the plants out of their pots, cutting both the root ball and the top growth way back, sticking that into a smaller pot for the winter, then repotting into a bigger pot for the growing season. Your chosen pot might do for a slower growing C. chinense like a habanero or a reaper, but cayenne varieties grow fast and big and need a lot of root for roots. Worm castings contain very limited amounts of nutrients. Both they and bone meal will break down in potting soil, but it will take a long, long time because both depend on microbial action to do so. Microbial activity is either limited or missing entirely from containers due to the highly fluctuating environment. The container gardening forum here has lots of discussion about good choices of container fertilizers, both organic and synthetic. The general consensus is that the purely organic route is possible but takes more effort and money. I have similar problems with tap water. If you fill the watering can, bucket, whatever and let it sit out, uncovered, for a day or so a lot of the bad stuff will offgas. Cheaper than buying bottled water, which is way less regulated than your tap water and may contain who knows what... Good call on the garden soil, though. The stuff tends to compact in containers and will starve the roots of oxygen. Epsom salts (magnesium sulfate) are one of the myths that the Internet (and the seller) loves to propagate as a miracle fix-all cure, but in reality they may only solve one problem (magnesium deficiency) that is really not all that commonly occurring to begin with. Foliar application does no good because the plants do not absorb magnesium through their leaves. There's a good discussion over at the Growing Tomatoes forum right now about the kind of damage ill-informed application of Epsom salts can do to tomato plants. Pepper plants are in the same family as tomatoes. If you do a bit of research you can find any one of many good fertilizers that contain more than enough magnesium. Not trying to harsh your mellow, bring you down, etc., just speaking from experience so that you can avoid making the kinds of mistakes I, and many others, have already made.