| Cultivar Name | Source | Plant Size | Leaf Color | Variegation | Var Color | Origin | Flower Color | Season | Registered |
| 'Falling Waters' | Lachman, Wm & Eleanor & Walek, Kevin | Large | Med-Green | Medial | Yellow | Hybrid | Med-Lavender | July | .2009 |
| 'Fancy Dancer' | Amberg, Mary | Large | Med-Green | - | - | Nat-Sport | Near-White | June into July | --NR-- |
| 'Fantasy' | Brodeur, Ernie | - | - | - | - | Unknown | - | - | --NR-- |
| 'Fascination' | Shaw, Florence & Ruh, Peter | Medium | Med-Green | Streaked | Creamy White | Hybrid | Pale-Lavender | - | .1978 |
| 'Ffred' | Xavier-Sakr, Suzzane | Giant | Med-Green | - | - | Nat-Sport | Near-White | July | .2005 |
| 'Fine Points' | Shaw, Florence & Walek, Kevin | Small | Med-Green | - | - | Hybrid | - | June into July | .2009 |
| 'Firefighter's Angel' | Xavier-Sakr, Suzzane | - | Light-Green | - | - | Nat-Sport | - | - | .2002 |
| 'Flapjack' | Lachman, Wm & Eleanor & Walek, Kevin | Medium | Med-Green | Marginal | Yellow | Hybrid | - | June into July | .2009 |
| 'Florence Nightingale' | Goodenough, Rick | Large | Blue/Green | - | - | Unknown | Med-Lavender | July | --NR-- |
| 'Flower Power' | Vaughn, Kevin | Giant | Med-Green | - | - | Hybrid | Pale-Lavender | July | .1987 |
| 'Formal Attire' | Vaughn, Kevin | Large | Med-Green | Marginal | Yellow | Hybrid | Pale-Lavender | August | .1988 |
| 'Fragrant Blue' | Vaughn, Kevin & Aden, Paul | Large | Blue/Green | - | - | Unknown | Pale-Lavender | August | .1988 |
| 'Fragrant Bouquet' | Vaughn, Kevin & AHS | Large | Med-Green | Marginal | Yellow | Hybrid | Pale-Lavender | July into August | .1982 |
| 'Frances Williams' | Williams, Frances & Williams, Connie | Large | Blue/Green | Marginal | Yellow | Nat-Sport | Pale-Lavender | July into August | .1986 |
| 'Frances Williams Squash Edge' | Williams, Frances & Williams, Connie | Large | Blue/Green | Marginal | Yellow | Nat-Sport | Near-White | June into July | --NR-- |
| 'Frank Lloyd Wright | Goodenough, Rick | Giant | Blue/Green | - | - | Unknown | Near-White | July | --NR-- |
| 'Fringe Benefit' | Vaughn, Kevin & Aden, Paul | Large | Med-Green | Marginal | Creamy White | Hybrid | Pale-Lavender | July | .2010 |
| 'Frosty Morn' | Lachman, Wm & Eleanor | Medium | Light-Green | - | - | Hybrid | Near-White | July | .1993 |
| 'FRW No. 1023' | Williams, Frances | - | - | - | | Duplicate | - | - | --NR- |
| 'FRW No. 1024' | Williams, Frances | - | - | - | | Duplicate | - | - | --NR- |
| 'FRW No. 1025' | Williams, Frances | - | - | - | | Duplicate | - | - | --NR- |
| 'FRW No. 1141' | Williams, Frances | - | - | - | | Duplicate | - | - | --NR- |
| 'FRW No. 1142' | Williams, Frances | - | - | - | | Duplicate | - | - | --NR- |
| 'FRW No. 1151' | Williams, Frances | - | - | - | | Duplicate | - | - | --NR- |
| 'FRW No. 1154' | Williams, Frances | - | - | - | | Duplicate | - | - | --NR- |
| 'FRW No. 1154' | Williams, Frances | - | - | - | | Duplicate | - | - | --NR- |
| 'FRW No. 1155' | Williams, Frances | - | - | - | | Duplicate | - | - | --NR- |
| 'FRW No. 1156' | Williams, Frances | - | - | - | | Duplicate | - | - | --NR- |
| 'FRW No. 1221' | Williams, Frances | - | - | - | | Duplicate | - | - | --NR- |
| 'FRW No. 1246' | Williams, Frances | - | - | - | | Duplicate | - | - | --NR- |
| 'FRW No. 1258' | Williams, Frances | - | - | - | | Duplicate | - | - | --NR- |
| 'FRW No. 128' | Williams, Frances | - | - | - | | Duplicate | - | - | --NR- |
| 'FRW No. 1290' | Williams, Frances | - | - | - | | Duplicate | - | - | --NR- |
| 'FRW No. 1350' | Williams, Frances | - | - | - | | Duplicate | - | - | --NR- |
| 'FRW No. 1373' | Williams, Frances | - | - | - | | Duplicate | - | - | --NR- |
| 'FRW No. 1383' | Williams, Frances | - | - | - | | Duplicate | - | - | --NR- |
| 'FRW No. 1399A' | Williams, Frances | - | - | - | | Duplicate | - | - | --NR- |
| 'FRW No. 1429' | Williams, Frances | - | - | - | | Duplicate | - | - | --NR- |
| 'FRW No. 2134' | Williams, Frances | - | - | - | | Duplicate | - | - | --NR- |
| 'FRW No. 305' | Williams, Frances | - | - | - | | Duplicate | - | - | --NR- |
| 'FRW No. 382' | Williams, Frances | - | - | - | | Unknown | - | - | --NR-- |
| 'FRW No. 383' | Williams, Frances | - | - | - | | Duplicate | - | - | --NR- |
| 'FRW No. 490' | Williams, Frances | - | - | - | | Duplicate | - | - | --NR- |
| 'FRW No. 502' | Williams, Frances | - | - | - | | Duplicate | - | - | --NR- |
| 'FRW No. 511' | Williams, Frances | - | - | - | | Duplicate | - | - | --NR- |
| 'FRW No. 537' | Williams, Frances | - | - | - | | Duplicate | - | - | --NR- |
| 'FRW No. 541' | Williams, Frances | - | - | - | | Duplicate | - | - | --NR- |
| 'FRW No. 791' | Williams, Frances | - | - | - | | Duplicate | - | - | --NR- |
| 'FRW No. 851' | Williams, Frances | - | - | - | | Duplicate | - | - | --NR- |
| 'FRW No. 941A' | Williams, Frances | - | - | - | | Duplicate | - | - | --NR- |
| 'FRW No. 942A' | Williams, Frances | - | - | - | | Duplicate | - | - | --NR- |
| 'FRW No.152' | Williams, Frances | - | - | - | | Duplicate | - | - | --NR- |
| 'Full Moon' | Lachman, Wm & Eleanor | Medium | Blue/Green | - | - | Hybrid | Pale-Lavender | July | .1991 |
|