That's awesome! I've been wanting to grow cauliflower, but haven't tried it yet. I grew broccoli very successfully from starts I bought, but had zero luck growing it from seed. That's my new adventure...successfully starting all of my coveted produce from seed. It's one of my attempts at teaching myself to be patient since patience doesn't come naturally to me.
You're right on the mark with that. We've always started everything from seed, either our own saved seeds or purchased. I don't start stuff that is better direct seeded like sweet corn, beans, etc., but everything else gets started from seed. If you're thinking about doing that, I highly recommend getting a small and regular size soil blocker (
http://www.johnnyseeds.com/p-8087-hand-held-4-soil-blocker.aspx) (
http://www.johnnyseeds.com/p-8088-hand-held-20-soil-blocker.aspx). Then, buy your starter, which is usually a sterile medium such as vermiculite and make small blocks with the small blocker and insert seeds in the indents on top. Then, take the seeds that sprouted (usually all) and insert the small blocks into the big blocks that you made out of potting soil or compost. Done this way there is no transplant shock. Continue raising the seedlings until ready to plant and then just place the block w/seedling into a hole and call it a day.
I've been using soil blockers since the early 80's and they're great to have. I'm still using the first ones I bought. They make starting seeds extremely economical because you don't have to purchase any seed starting trays or other material to pot the seedlings in. I do recommend getting a couple of commercial seed flats or plastic pans from
Walmart to hold your blocks in. The commercial trays are more expensive but they last an extremely long time. The ones I'm using I bought back around 1990.
Yeah I wouldn't ever want to have to rely on seedlings from the stores, and even the local nurseries because they never, ever have the best varieties for your specific area. Also it's impossible to find some of the heirloom varieties we like best. Once you begin starting your own seeds it'll open up a whole 'nother world for you with so many more options to choose from.
Also, there's a lot of great books on the subject but one of my favorites is The New Seed Starters Handbook by Nancy Bubell (
https://www.amazon.com/New-Seed-Starters-Handbook-Nancy-Bubel/dp/0878577521/ref=sr_1_sc_1?s=books&ie=UTF8&qid=1474660291&sr=1-1-spell&keywords=seed+starting+nancy+bubell). It's a great read; my book is still holding together but it's a bit weathered. I have to warn you though, starting vegetables from seed is about as addicting as raising chickens. Once you get started you'll probably get involved in saving seeds and making your own crosses, etc. It's another one of those life-long interests that never gets old or boring.