What you must first understand is the fertilizer companies have done a real good job of salesmanship - we are all absolutely convinced our plants need copious amounts of fertilizer or they will hate us.
Here are some basic 'rules'
Fertilizers all contain pretty much the same nutrients but in different stengths. Most plants will do fine with just about any fertilizer that is well balanced and has micro-nutrients.
Don't use fertilizer stakes as only one part of the root system is fertilized. The roots support the plant above them so if you add 1 stick to a pot, 1/4 of your plant will get over fed while the rest goes hungry.
Check the potting soil package. A lot of potting soils come with added nutrients. If you add fertilizer to those soils in the first 6 months, you run the risk of over-fertilizing.
When you do fertilize, use it at 1/4 to 1/2 the recommended strength.
Most plants only need fertilizer a few times each year and some don't need it at all. Hoyas are on that list.
If a plant is stressed (just transplanted, fighting off bugs, looks sickly) don't fertilize in hopes that will make it feel better. It won't.
We all have our favorite fertilizers so if you ask, you will get a lot of different answers. I once attended a seminar led by a well known west coast orchid grower. You can buy a lot of different orchid foods, depending upon where the orchids are in their annual growth cycle. Someone asked what he would use. He said mix them all together and use them at reduced strength.