I've developed a little bit of a system for transplanting (or maybe I've discovered something everyone already knewlol). I like to move my plants out into the parking lot to get full sun and so I don't want to have to move a big pot until I have to. I've been using the black plastic pots that you buy for 89 cents or whatever. I buy them in several sizes. When the plant outgrows the pot, I water the plant really well and then I cut the bottom off of the smaller pot and place the whole thing in the bigger pot. Then I cut down the side and peel the smaller pot off completely, and fill up the rest of the big pot with soil. Right now I have a yellow pear cherry tomato plant in a 5 gallon bucket and it has clearly outgrown it, but I am scared to death to attempt to transplant it. It is 6 feet tall, in a tomato ring cage and like 50000 bamboo stakes to supplement that stupid wimpy cage. It looked so small when I got it and since the tomatoes are small I thought it would be fine in a pot! (Which, now that I think about it, makes NO sense). Turns out they grow up to 12 feet high. whoops.

Likely if you eat tomatoes from the store they are production tomatoes. 1. They won't have the taste like a good gardener hybrid or heirloom tomato (in other word they tastes like cardboard). 2. They are hybrid, when you replant a seed from a hybrid plant, it won't be exactly like the original plant, it will have different characteristic and may not taste as good or have desired traits. I would rather order some seeds online and grow some dwarf tomato instead. If you intend to grow indoor you will need some good lighting and space. Something like this is minimum I would recommend for full size tomato indoor: https://www.1000bulbs.com/product/8256/FC105-S50OD.htm. So as you can see, tomato need lots of light which isn't not going to work in a single room dorm. Not only that, they need lots of soil, at least a 5 gallon container. So it's better off growing something like lettuce or basil indoor, or look for a dwarf or microdwarf tomato variety. Some variety to consider are: Red Robin, Tiny Tim, Silvery Fire Tree. For indoor potting soil, make sure you ask question and find the right potting soil that does not smell and perhaps pasteurized for indoor use, otherwise it will be an unpleasant experience. I don't buy potting soil, but I know "FoxFarm's Potting Soil" have good reputation so you may want to check them out, but I don't know how it'll smell. In my bedrooom I have an "AeroGarden Extra LED" that let me grow vegetable hydroponically, and it's LED light is bright enough to provide light for some extra plants in smaller container next to it. It is full spectrum and would be adequate for small dwarf tomatoes. It have a timer and shuts off after 12-16 hours. It is also very easy to make your own affordable indoor hydroponic setup. However, considering you live in a dorm, I don't know if you may have issues with campus authority who will be concerned with cannabis growing which is quite popular with hydroponic growing (not that I'm trying to give an idea).

Just as with most flowers the age of the bloom controls the petal location. A rose bloom is a good example and the changes are more visible. They begin closed, gradually open over time as they age until fully expanded, begin to wilt, and then dry up and fall off. It really has no effect on pollination in self-fertile blooms like tomatoes as in many cases they are already pollinated before they even open. Dave

That's not a virus. Probably some kind of cultural stress. Agree with Jean that the Hydro forum is a better place.