Buying True Black Brandywine Tomato seeds from a supplier is always a little tricky, mainly because many distributors aren't exactly the same. If possible, make sure to purchase your tomatoes from a reliable, well-known breeder and cultivate them yourself. If you don't have enough space or time to do it yourself, then it's best to pay someone else to do it for you. There's no shame in cultivating your own tomatoes, as they're so small and fragile that any mishandling can lead to problems. There's also no shortage of kits available for home gardeners, so if you do grow your own tomatoes and want to market them, then look for one of those kits.
Some wine making guides suggest that wholesale true black brandywine tomato kits should only be used by beginners. Others recommend that they should be used by experienced wine makers too, but I've never personally tried one of those kits and so I don't know how they work or whether they're worthwhile. If you're just starting out, I wouldn't worry about it. The cost is small enough that you won't mind buying a kit from someone who is just beginning their wine making business.
As for the instructions in the wine making guide, I did find some differences between buying wholesale true black brandywine tomatoes and growing them yourself. For example, I've read that you shouldn't mash the tomatoes because the skins will clump up and there will be less of them. However, I didn't try this out, and my tomatoes were very smooth when I threw them into the pot of water with the salsa. It took a little while, but they were as smooth as can be!
You will need to find a good source of wholesale true black brandywine tomatoes. You can grow your own or buy them from the store. There are some people who swear by the dried ones from the supermarket (my mother does). I didn't try it, but I assume that they're the best.
If you don't have the money to buy fresh seeds, you can use frozen ones instead. Don't forget that you'll need something to put the tomatoes in, though. You could use a plastic pot, but I've had better luck growing them in a tall metal container. Just make sure it's large enough to hold the whole seeds. That way they can get the sun they need without burning.
When you're ready to plant, dig a hole the same size as the seed packet was. Put the tomato seeds into the hole and water them well. You might want to wait a day or so before putting the tomato in the ground to give it time to get started. Make sure the soil is well-drained before you plant it. When the seed packet is ready, you can place it in the hole and water it well, but make sure that the soil is still moist.
Most people will plant their seedlings in the spring, but for those who live in the southern states, the late summer is best. Avoid planting in the winter. The soil may be too frozen and hard. Then, it will take too long to germinate. Once the seeds sprout, they'll be able to get a head start on growing.
When growing your own tomatoes, be sure to get plenty of sun. It's important for them to get the right amount of nutrients at all times. That's why it's good to use true black tomatoes. They're packed full of vitamins and nutrients that your veggies won't get from anything else.