It's not the same.
Sprout is sort of a misnomer when it comes to what most people are talking about when they say they are feeding "sprouts" to birds.
A better description is really soaked seed that has only just barely begun to sprout (also called a "chit") - where the seed head is just starting to creep out of the seed.
[Photo of my sprouts at collection]
Any more than about 1/8" of growth on the seed (and even that I feel is too long) and it's pretty much a waste of energy.
When the seed is just barely beginning to "sprout" is when it is at it's most nutritious.
The longer you let it "grow," the more energy the seed puts into sending out the shoot, so the less energy is contained within the seed itself.
It is expended, if you will.
Just "chitted" seed is about 400x more nutrient dense than dry seed alone, and is a fantastic protein rich food for breeding and molting birds.
Seeds grown in a pot may be fun for the birds to eat, but do not offer the same degree of nutritional value - and the commercial seeds for wild birds do not undergo the same regulations as feed intended for the pet bird trade.
Not to mention - seed dropped under an outdoor feeder and then sprouted - the wild birds likely defecate in that area and can carry a number of diseases and parasites that you could then inadvertently pass to your flock.
The way I sprout:
1 quart mason jar
Squirt about 1/4 teaspoon of Sparkle into jar
Add water
Add 1 cup of sprout mix (I use the Birds R Us White Sprout Mix, but you can also use any fresh seed blend that does not contain any pellets or other bread/biscuit bits)
Fill to the top with water
Let soak for anywhere from 2-24 hours.. Some only suggest soaking for 2 hours, but I usually soak longer and have never had problems.
Strain & Rinse the seeds, then place back into the mason jar to set for another 24 hours (do not refill with water at this time, just place the strained seeds back into the jar).
Rinse well after 24 hours and serve!