enchantment loop

My watering can is iridium level and i have the bottomless enchantment and everywhere I read online it says the reaching effect should work but it does not. I have tried everything to get it to work and it does not. Help ?

I'm trying to enchant my watering can and hoe with the reaching enchantment. I've been trying randomly for at least 3 seasons and it's stuck in a loop. I got 14 prismatic shards and over 200 cinder shards. I tried 14 times and got swift, generous, efficient and archaeologist repeatedly for the...