The shot of the canal and oak trees is well-framed I think. The purple flowers shot does not work very well: there's equal emphasis and space on the OOF background and the close-up foreground, and it just does not make a successful shot.
The backlighted leaf is nice, but I think it's framed too low for maximum impact.
The blossoms and the blackberry vine and its thorns is a contrast between hard,sinewy and prickly, and soft and gentle. I like the contrasting themed elements, and think it's well-composed, with good use of the frame's total space. The diagonal entry of the vine is good, and "active", while the blossoms balance that diagonal. Good B&W conversion too.
Instagram USED TO BE all-square compositions; allowing talls and wides has changed the platform in a big way. A square format forces you to crop away a lot of extra space, which can be a good thing. Like on the leaf photo: as a square, that would be a different picture.