is online, here. A notebook, really. 66 pages long, but several pages are missing. He made notes of his major seed sowing dates and harvest times, crop successes and failures. A half-dozen entries in most years. Not much gardening in August (but lots of fall planting).
Indian corn and black-eyed peas "came to the table" on August 3, 1774.
Apparently no gardening in 1776. I guess he was busy with other stuff.