Retirement Pastels

Theme:  How does your garden grow?  Chaotically, as it turns out.  But in an unremarkable way.  Can we separate the crops from the weeds?  Grab your hoe and lets dig in.  Best to start with the unifier, I think.
59 A. Run-of-the-mill, or what can be found in the answers to the starred clues?: GARDEN VARIETY. Ordinary.  Not special or unusual.  But what is unusual is the use of the word "VARIETY" to indicate a scrambled letter, hidden word theme.  Here, the word...

Theme:  Unfitness Routine for the Lazy.  The second word of a two word in-the-language phrase also had a different meaning in a physical activity context.  The result, from a certain oblique perspective, is a humorous wordplay in which the activity is...

Theme:  If we could turn back time.  The word "DAY is hidden in each theme entry, but spelt backwards.  Not easy to find.  Nota bene: each YAD is split across two words.
21. Beach community in L.A.'s South Bay: PLAYA DEL REY.   A seaside suburb in the Santa Monica Bay and the South Bay region of Los Angeles County, California. As of 2018, the community had a population of 16,230 people....

Theme: Terms of Endearment - Career-specific phrases identifying one's object of affection.
17. Beekeeper's valentine?: HONEY BUNCH.  A beekeeper is a person who owns and breeds bees, especially for their honey.  Their love is sweet.
25. Juice barista's valentine?: MAIN SQUEEZE.  A juice barista prepares and serves fruit-based beverages, which presumably involves some squeezing.  The main squeeze is someone's preferred girl/boyfriend or lover. No indication is given for the one in...