| No. | Cultivar | Plant Size | Leaf Color | Variegation | Var Color | Origin | Flower Color | Season | Source | Registered |
|
1
| 'Ayers Rock' | Unknown | Med-Green | | | Unknown | Unknown | Unknown | Unknown | --NR-- |
|
2
| 'Blue Rock' | Giant | Blue/Green | | | Unknown | Near-White | June to July | Fisher, Eunice V. & Stone, David | .1986 |
|
3
| 'Crocodile Rock' | Large | Med-Green | | | Unknown | Deep-Purple | July to August | Wilkins, Dr Jim | .2000 |
|
4
| 'Gravity Rocks' | Small | Blue/Green | Medial | Yellow | Sport | Med-Lavender | July to August | Philips, Hugo & Van Eechaute, Danny | .2015 |
|
5
| 'Herbie Rocks' | Small | Med-Green | | | Hybrid | Med-Lavender | July to August | Zolock, Steve & Zolock, Sarah | .2005 |
|
6
| 'Intrinsic Twisted Sister' | Large | Med-Green | | | Unknown | Unknown | Unknown | Horvath, Brent | --NR-- |
|
7
| 'It Rocks' | Large | Dark-Green | Marginal | White | Hybrid | Med-Lavender | June to July | Elslager, Ed | .2004 |
|
8
| 'Lord Rock' | Medium | Dark-Green | | | Hybrid | Pale-Lavender | June | Wade, Van | .2007 |
|
9
| 'Milky Rock' | Medium | Med-Green | | | TC Sport | Pale-Lavender | July to August | Zilis, Mark | --NR-- |
|
10
| 'PAL's Plymouth Rock' | Medium | Light-Green | | | Sport | Near-White | June to July | Lehtola, Paula | .2008 |
|
11
| 'Peter The Rock' | Large | Light-Green | | | Hybrid | Pure-White | June | Simpers, Lucille & Ruh, Peter | .1991 |
|
12
| 'Plymouth Rock' | | - | | | Duplicate | - | | Duplicate Name | |
|
13
| 'Rim Rock' | Small | Med-Green | | | Hybrid | Light-Purple | July | Savory, Robert | .1982 |
|
14
| 'Rock and Roll' | Large | Blue/Green | | | Sport | Near-White | June | Kuk, Bob | .1999 |
|
15
| 'Rock Baby' | Small | Med-Green | | | Unknown | Unknown | Unknown | Aden, Paul | --NR-- |
|
16
| 'Rock Garden Blue' | Large | Blue/Green | | | Unknown | Unknown | Unknown | Tompkins, Chet | --NR-- |
|
17
| 'Rock Girl' | Small | Med-Green | | | Unknown | Unknown | Unknown | Schulte, Steve | --NR-- |
|
18
| 'Rock Happy' | Medium | Med-Green | | | Hybrid | Med-Lavender | August | Ruh, Peter | .1992 |
|
19
| 'Rock Island Line' | Small | Med-Green | Marginal | Creamy White | Hybrid | Light-Purple | June to July | Rassmussen, George | .2001 |
|
20
| 'Rock Master' | Miniature | Med-Green | | | Hybrid | Unknown | Unknown | Aden, Paul | .1982 |
|
21
| 'Rock Prince' | Small | Yellow | | | Unknown | Med-Lavender | August | O'Brien, John | --NR-- |
|
22
| 'Rock Princess' (Nakaiana) | Small | Med-Green | | | Unknown | Light-Purple | June | Unknown | --NR-- |
|
23
| 'Rock Star Land' | Medium | Blue/Green | | | Hybrid | Unknown | Unknown | Stadden, Josh | --NR-- |
|