A painting of persimmons expresses good wishes to friends and relatives when they have difficult time or start a new career.  These paintings of  “big millstone” persimmons are playing with the different patterns of screen windows.
Six persimmons by Mu Qi
Persimmon trees have four virtues: long life, shade, nesting for birds, resistant to insects, and are frequently planted in temple gardens.
Obviously no-one can paint persimmons without paying homage to Mu Qi.