So I just checked on the dragonfruit and mango sapling I have growing outside in pots, and turns out the dragonfruit are growing quite fast. Some are sprouting little growths, others are sporting newly sectioned nibs. They look so cute on top of getting slightly firmed thorns when I tried replacing their supports with something larger. A few are measuring a good 6-7 inches tall so far.
The mango sapling I'm going to have to find a bigger pot to move it to. What I think could possibly be a taproot is pushing the stalk at an angle. But it looks quite healthy for something that hasn't been grown a whole year yet.
I've also realized my new neighbors have planted trusses for their vine plants right on the borders of the properties between our houses and they don't look like they're doing too well. Which isn't good because that was the spot I was planning on propping up my dragonfruit. At least now that I know the soil there isn't good I'll have to find a better spot to plant it and the mango tree at.