| ARMSTRONG | Mrs Gnat or the first man to 'Neil' on the moon - as in the cultivar of Acer rubrum! (9) |
| APRILFOOLS | Elvis seen on the moon as Lord Lucan turned up for jokes after March (5,5) |
| SEDAKA | Musical guest Neil on the first season of 14-Across |
| ANTIQUITY | Referring to times long since passed, as in the cultivar of both Cosmos bipinnatus and sempervivum (9) |
| IOTA | This small quantity is the ninth letter of the Greek alphabet, as in the cultivar of dionysia: 'Ewesley ___' (4) |
| VISCOUNTESS | Woman in the fourth rank of nobility, as in the cultivar of Hesperantha coccinea '___ Byng' (formerly a schizostylis) (11) |
| AZTEC | Member of a state in central Mexico that was conquered by Cortes in 1521, followed by an oyster gem - as in the cultivar of Choisya x dewitteana (5,5) |
| PEARL | Member of a state in central Mexico that was conquered by Cortes in 1521, followed by an oyster gem - as in the cultivar of Choisya x dewitteana (5,5) |
| TONGA | (comprising 169 islands) in the southern Pacific Ocean, as in the cultivar of New England aster (Symphyotrichum novi-belgii) (5) |
| RISER | Vertical section between the treads of steps, as in the cultivar of sempervivum: 'Firgrove Early ___'! (5) |
| COSMONAUT | One visits moon, as cut is abandoned |
| QUICKSILVER | Alternative name for the metal mercury, as in the cultivar of Hebe pimleoides (11) |
| BAKED | '___ Beans', as in the cultivar of geum - and a tin of! (5) |
| EGO | Self-esteem or self-image, as in the cultivar of Siberian iris (3) |
| DOME | Buildings, typically with a circular base, as in the cultivar of New England aster (Symphyotrichum novibelgii): 'Purple ___'! (4) |
| LILLIPUT | Island in Swift's Gulliver's Travels, where the inhabitants are 6in tall, as in the cultivars of agapanthus and Tulipa humilis (8) |
| UTO | Imaginary society possessing highly desirable or nearly perfect qualities, as in the cultivars of Phlox x arendsii, and the floribunda rose (3) |
| PIA | Imaginary society possessing highly desirable or nearly perfect qualities, as in the cultivars of Phlox x arendsii, and the floribunda rose (3) |
| DELTA | Tract of sediment deposited at the mouth of a river, typically where it diverges into several outlets, as in the cultivar name of both heuchera and hosta: '___ Dawn' (5) |
| EPACT | It's the age of the moon as told by an alien in a cap (5) |
