Hey dude. I'd suggest that instead of using the Tiger Bloom you use Big Bloom. The Tiger Bloom is a bit hot for most systems and a lot of people have some trouble with it. The Big Bloom is a little more gentle and great for assisting in flowering. Since you're beginning flowering so soon I also suggest that you don't even bother with the Grow Big. All you'll need is the Big Bloom.
It's good you're using so much perlite. I'd suggest using more like a 75% soil 25% perlite mixture when you plant the seed (like in a party cup or small container) to give a little more structure for the younger root system. When you transplant to a larger planter then you can use the 40% perlite. With the Ocean Forest and your seedling you're not going to want to feed for a while. It shouldn't be too hot, but there's enough food in that soil for at least the first 20 to 25 days of life.
If feeding full strength a good habit is to feed, water, water, water, feed, water... You can also do more like 40% strength feedings and feed, feed, water, feed, feed, water... You can tell when to water by lifting the planter up, when it is outrageously light you'll water again to complete saturation with at least 20% running through the container to remove excess salts and keep the media healthy. Watering or feeding every 3 days or when the planter is dry is the best habit. Sooner than every other day and you probably need to transplant to a larger container.
Big Bud is a relatively moderate feeder during flowering. Not too heavy, or too light, pretty stable and hearty all around. The flowers will pack on, so hitting it with with the extra nutrients at the right time is what is important to do.