| Plant of mixed origin | 21 |
| Plant of mint family | 20 |
| Plant of lily family | 20 |
| Plant of forgetfulness | 22 |
| Plant of carrot family | 22 |
| Plant of arum family | 20 |
| Plant of amaryllis family | 25 |
| Plant of a sort | 15 |
| Plant nursery started by a football Hall-of-Famer? | 50 |
| Plant nursery activity | 22 |
| Plant nuisance | 14 |
| Plant new trees | 15 |
| Plant new seeds | 15 |
| Plant new crops | 15 |
| Plant need | 10 |
| Plant native to Taiwan | 22 |
| Plant native to S. Africa | 25 |
| Plant named for a Jesuit | 24 |
| Plant named for a governor of Santo Domingo | 43 |
| Plant named for a former Yucatán port | 40 |
| Plant moved by an ant, in song | 30 |
| Plant more seed | 15 |
| Plant more crops in | 19 |
| Plant moisture buildup | 22 |
| Plant modified by environment | 29 |
| Plant membranes | 15 |
| Plant matter used as a plant covering | 37 |
| Plant material used for fuel | 28 |
| Plant manager? | 14 |
| Plant malady | 12 |
| Plant louse | 11 |
| Plant liquid | 12 |
| Plant like cabbage | 18 |
| Plant like a plantain | 21 |
| Plant life treatises | 20 |
| Plant life in soils | 19 |
| Plant life | 10 |
| Plant lice | 10 |
| Plant leaf | 10 |
| Plant leader | 12 |
| Plant lacking chlorophyll | 25 |
| Plant known as "seer's sage" because of its hallucinatory effect | 78 |
| Plant juices | 12 |
| Plant juice | 11 |
| Plant joints | 12 |
| Plant joint | 11 |
| Plant inspection expert | 23 |
| Plant insect | 12 |
| Plant injury | 12 |
| Plant inflorescence | 19 |
| Plant inducing forgetfulness | 28 |
| Plant in the primrose family | 28 |
| Plant in the pea family | 23 |
| Plant in the office | 19 |
| Plant in the "Odyssey" | 32 |
| Plant in subsequent seasons | 27 |
| Plant in Greek legend | 21 |
| Plant in Flanders fields | 24 |
| Plant in an underwater forest | 29 |
| Plant in a sedating drink | 25 |
| Plant in a new home | 19 |
| Plant in a larger container | 27 |
| Plant in a garden | 17 |
| Plant in a Fugard title | 23 |
| Plant in a color comparison | 27 |
| Plant in a bog | 14 |
| Plant in a 1970s bar | 20 |
| Plant humidifier | 16 |
| Plant homes | 11 |
| Plant holders | 13 |
| Plant holder? | 13 |
| Plant holder | 12 |
| Plant having milky juice | 24 |
| Plant having fleshy leaves | 26 |
| Plant having edible pods | 24 |
| Plant having cloves | 19 |
| Plant having blue flowers | 25 |
| Plant having a bitter juice | 27 |
| Plant growth medium | 19 |
| Plant growth caused by fungi | 28 |
| Plant grown on "pets" | 31 |
| Plant grown in field ponds | 26 |
| Plant growing near the sea | 26 |
| Plant growing in spongy soil | 28 |
| Plant group | 11 |
| Plant grafts: Var. | 18 |
| Plant grafting component | 24 |
| Plant graft: Fr. | 16 |
| Plant geneticist, at times | 26 |
| Plant gathering information | 27 |
| Plant gametes, e.g. | 19 |
| Plant gametes | 13 |
| Plant fungus diseases | 21 |
| Plant fungus | 12 |
| Plant fungi | 11 |
| Plant fuel | 10 |
| Plant fruit | 11 |
| Plant found in dry places | 25 |
| Plant form | 10 |
| Plant for Yuletide | 18 |