Burned tips after feeding?
Brown margins soon after a heavy dose of fertilizer can point to excess salts.

What to check first
Review what you used and how much. A crust on the mix or pot rim can be a clue, though hard water can leave deposits too. Check if the pot drains freely.
What to do now
Pause feeding. If excess fertilizer is likely, the plant tolerates a thorough watering and the pot drains freely, flush the mix with plain water and let it drain. Do not flush a waterlogged pot.
What to watch next
Watch new growth; scorched edges will stay brown. If browning spreads or the pot stays wet, check roots and drainage before feeding again.