There are different kinds of fertilizers for different types of plants, foliage plants that don’t bloom I suggest fish emulsions. During the growing seasons use fish emulsions about once every 10-14 days. One capful per gallon of water. Fish Emulsions can be used for all plants and blooming plants too.
Blooming plants that are in pots, and outside I suggest slow release food such as osmocote because you only have to apply it once for the season, unless you live in warmer zones.
Acid loving plants like azeleas, Rhodies, Blueberries, Hibiscus, ferns, lilies, Hydrangeas, Viburnium, Gardenias, Barberries, Raspberries, Strawberries should be fed with an acid fertilizer. The more often you give them acid fertilizer they usually bloom more often or produce better color. Also most acid loving plants likes peat moss mixed into the soil and mulch around them.
Roses needs rose food especially with the insect controlling pellets with it to protect them and feeds them at the same time.
Tomatoes- I feed them with osmocote, and sometimes if you start to see bloosom rot developing (Black spots on the tomatoes) place some epsom salt on top of the soil and water the tomatoes this will give them calcium with they are lacking.
Broccoli- should be soaked in cool water, lots of times you don’t see the green cucumber worms but lots of times they are there on your broccoli. Soaking them for about an hour will drown any worms that might be there.
Peppers loves sulfate so when I plant peppers, I use 3 match sticks and insert them around the soil very close to the roots.
Lavenders loves lime, so I usually add it to the soil when planting them. And Lavenders makes other plants grow better, I don’t know why but they do.
Super bloom food- Powder also can be used for potted blooming plants, don’t use it on dry soil wet the soil first then add the water mixed with powder food. I find the Peters super bloom food one of the best.