Whilst Owen has so many meanings that can be infinitely extrapolated, I would add the notice of a metaphor in the flowers. Those at home, removed from the war condition hold the soldier's within their flowers; tender, gentle. This is however, ultimately ironic as both the soldier and a cut flower experience the same ultimate condition.
This poem also is crucial for showing his progression through the war condition, so I would say that it is prudent to realise these mental contexts whilst analysing. A general structure:
AFADY: Moral questions, initial observation, notice of effect to those removed
DDE: Satirical confronting of those who facilitate the war condition, perpetuation of the semiotic disconnect between what war is purported to be, and what it actually manifests to.
TNW: A movement towards nihilism, a submission to the context, a dehumanisation and view of death as the incidental enemy
F: Questions of biblical motives, existential questions, further nihilism and fatalism, dismissal of biblical allusions, although subtle
I: Dehumanisation, submission to context, loss of consciousness
SM: Complete removal of critical faculties, soldiers convergence although on opposing sides of a war, death as the incidental enemy.
When a line, or sequence, or stanza doesn't make sense, refer to a similar structure. Such will allow you to analyse and furthermore, improve your analysis as it will be in context of Owen's overall conscious movements.