Regarding this, will my Hoya heart grow?
While they are relatively low-fuss plants, Hoyas are NOT known for being fast growers. I have read that Hoya Kerrii can grow over 10 feet, but this is in absolutely perfect conditions and will take many years to accomplish. You’re more likely to find a Hoya Kerrii that is one to two feet long.
Likewise, people ask, what do you put in the bottom of a planter for succulents?
Soil: Succulents and cacti thrive in well draining, porous soils. Gravel or expanded shale can be added to the bottom of the container to help increase drainage. A basic, sandy potting soil mixed with vermiculite makes a great succulent mix!