Here are the possible solutions for day holiday when many trees get planted clue
Answer
Clue
Relevancy
arbor
Clue
___ Day (holiday when many trees get planted)
Definition
(Latin) a shady garden shelter, also ARBOUR
elms
Clue
Trees planted around Eetion's tomb in the "Iliad"
Definition
ELM, a kind of deciduous tree
forested
Clue
Planted trees
Definition
FOREST, to convert into a densely wooded area
tafts
Clue
First family when D.C.'s earliest cherry trees were planted
tree
Clue
Something that gets planted on Arbor Day
eve
Clue
Valentine's Day ___ (holiday that doesn't exist, but if it did, it would be the night when people rush to get last-minute gifts for their significant others)
Definition
a poetic word for evening, also EEVEN, EEVN, EEVNING