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Taylor Swift might be a fan of redwoods, but Kylie Kelce wants everyone to know she REALLY loves her Japanese Maples ... going to Instagram to make it official after her hubby, Jason , compared his junk to the puny tree last week.

Fans spotted Kylie's updated social media bio on Thursday ... about a week after Jason and Travis Kelce broke down Taylor Swift's new song "Wood" -- which ain't exactly about plants -- on their "New Heights" podcast.

While Trav played coy as his bro pressed him on the track ... Jason joked that any song about his appendage wouldn't be as generous.

"It'd be like Japanese Maple," he said ... before adding, "Sometimes can see."

During the latest edition of their show, Jason spoke about his wife's love for the tree -- saying as long a

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