@ArizonaPancakes.
Again, very nice work. Thank you for sharing it.
1. Is the first line the title? If so, use title-style capitalization and set it off by skipping a line after it.
2. “on warm summer evening”
Should be either “a warm summer evening” or (more likely) “warm summer evenings” (plural).
3. essiness is right about the “I swear” line and “your name.”
4. Your capitalization is inconsistent. In some places you follow the traditional poetic convention of initial capitalization of a line (“Your beautiful…”) even though it is not the start of a sentence; in others you use lowercase (“the yard”). If there is a poetic reason for the inconsistency, such as a subtle emphasis on the “You,” you must know what your reason is. If there is no such reason, you should be consistent and follow one rule or the other. (I actually think lowercase suits your verse better.)
5. The same comment about capitalization also goes for punctuation. For the most part you follow standard sentence punctuation, but then in places you don’t. As I commented yesterday, your punctuation should be impeccable and should support meaning. There should be a reason for any departure from convention or from your established style. It can’t be random.
Here you have a comma splice (two grammatically independent sentences joined by a comma instead of being broken with a period): “I swear saw you flying over the house, you were a black raven,” If you have a poetic reason for doing this, you have to be able to articulate it in your own mind; otherwise it mars the poem and detracts from the reader’s confidence in you. (I do think there is a reason, and so I did not correct the two comma splices, but I am not the poet, and so my reasoned choice can’t be substituted for yours. I did add a series comma after “friends.”)
I would offer the following gently edited version:
A Thousand Dandelions
Do you still remember the house,
the yard, the shed full of old tools and all your books?
Do you remember the porch, where we sat on warm summer evenings
discussing family, friends, and dreams as wide as the universe?
I swear I saw you flying over the house, you were a black raven,
your beautiful feathers shining blue-black in the bright sun.
I ran to the edge of the yard, I called out your name and a thousand dandelions
fell from the sky.