ACROSS
1 Herb of the mentha genus (4)
3 and 19 across Singular subject of this week’s Miscellany (6,6)
6 A long, pointed one of these growing into the soil, is known as a tap____ (4)
7 British Association of Rose Breeders (1,1,1,1)
8 Nothing to do with the price of beer, ___cost is one of the common names of Tanacetum balsamita, a Eurasian perennial herb with button-like yellow flowers! (3)
11 Spring bedding plants of the cheiranthus genus (11)
15 Accepted acronym for the tomato mosaic virus (1,1,1)
17 and 18 across Ice crystal precipitation and fall, making galanthus! (4,4 making 8)
18 See 17 across
19 See 3 across
20 Potatoes and animals have them, and we see the point of needles having them! (4)
DOWN
1 F1…