LET THE LONGING BEGIN. Frost finally hit Friday, with two more visits since, bringing many things gradually to their knees. I’d just gathered the last barrow of tomatoes and the final ‘Benary’s Giant’ zinnias in matching tomato shades, red and green and orange, the only zinnia colors I grow. I’ll miss these humble flowers I’ve known since childhood. As we’ve discussed before, and will again: Nothing lasts. Which among the recently hobbled beauties will you miss most?