Why can't I get any hallow grass in the hallow biome EVER? Am I doing something wrong?

[travistotle]

I'm trying to get Unicorns to spawn so I can get some Unicorn Horns for Holy Arrows, and it occurred to me that I've never seen a Unicorn show up in my game, EVER.

Looking into it further, I realized that my hallow biome NEVER spawns with solid ground; there's always water running through it. What gives?? I've seen hallow biomes with flat hallow grass in people's Terraria vids all the time, and it NEVER spawns for me that way. I've straight up created THREE DIFFERENT worlds, and all my hallow biomes are underwater, always. Is there some reason that's happening?

I know I can buy hallow seeds from the Dryad and create the ground to make a Unicorn to spawn, but them thangs are PRICEY! Is there any other easy ways to get Unicorns to spawn?? Because every world I've created, the hallow biome that spawns makes it impossible for Unicorns to show up, and it's seeming intentional at this point.

[dandinks]

Buy hallowed seeds from the dryad and set up a runway of dirt that extends past your view range, enemies will spawn on mass ready to be mowed, my hallowed always overlaps my jungle = no hallowed grass = I always set up my own hallowed beforehand

[sarteck]

I've only played one world up to Hardmode, but my Hallow did not touch any bare dirt, either. It was directly through the snow, and not enough Pink Ice nearby to spread it to the nearby Forest between it and the Dungeon.

I didn't care about Unicorns; I needed Light Mummies for something, and the Crimson pretty much completely devoured my surface desert almost on impact. So I planted a few pink Ice on the border of the snow and started spreading it until I got to a relatively flat area where I made my desert and set up a small arena with Water Candles and banners for farming. Unicorns were an incidental spawn while I was doing this, and I ended up with a LOT of Unicorn Horns very quickly, and several Blessed Apples to boot. (And my Ice Fishing surface base became half Hallow half Snow depending on where I stood, hah, that was convenient.)