Robert Graves was frequently a nutjob, but he was almost always spot-on about poetry. From "The Grosser Senses," in The Common Asphodel:
Shelley was a volatile creature of air and fire: he seems never to have noticed what he ate or drank, except sometimes as a matter of vegetarian principle. Keats was earthy, with a sweet tooth and a relish for spices, cream and snuff, and in a letter mentions peppering his own tongue to bring out the delicious coolness of claret.
....When Shelley in Prometheus Unbound mentions:
The yellow bees in the ivy-bloom,
he does not conjure up, as Keats would have done, the taste of the last hot days of the dying English year, with over-ripe blackberries, ditches full of water, and the hedges grey with old man’s beard. He is not aware of the veteran bees whirring their frayed wings or sucking rank honey from the dusty yellow blossoms of the ivy.
And surely Graves means us to think of the stunning opening of the ode "To Autumn":
SEASON of mists and mellow fruitfulness,
Close bosom-friend of the maturing sun;
Conspiring with him how to load and bless
With fruit the vines that round the thatch-eaves run;
To bend with apples the moss’d cottage-trees,
And fill all fruit with ripeness to the core;
To swell the gourd, and plump the hazel shells
With a sweet kernel; to set budding more,
And still more, later flowers for the bees,
Until they think warm days will never cease;
For Summer has o’erbrimm’d their clammy cells.