How many letters does the top answer for “latticework used to support climbing plants” have?

The most common answer is treillage (9 letters).

Crossword clue: latticework used to support climbing plants

2 answers found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

treillage 9 letters wn-def

latticework used to support climbing plants

trellis 7 letters wn-def

latticework used to support climbing plants

a framework that supports climbing plants 50% similar → arbor, arbour, bower