1:33 PM, Monday September 25th 2023
I see it now. For the 3rd plant, the sides of a pedal actually curl upward instead of downward like I mentioned. In this case you can use cast shadow to show this nature (see this image).
For the sunflower, you should draw a heart shape from the get go. However, if a simple curve is unable to capture the shape of the leaf, you can add additional flow lines like he demonstrates here and here. This image is how I would tackle the leaf using the method introduced previously.
Hope this helps!