miracel grow Xpand yellow leaves

I have plants who have yellow leaves problems. Now there are on 30 day of Veg .

Looks like early onset of nute burn. Hard to see exact color but them leaves look pretty dark green = excess N. Tips starting to burn. And it all goes downhill from there.

Challenge is that you are using MG. Remember that water dissolves/releases the nutes. So be careful not to water too quickly, allowing pools or stuff like that.

Only Miracle grow I recommend is moisture control..Other versions can get hot. Most you need to water with ph 7 water and mix lots of perlite in to reduce strength. If your 30 days in veg why is that plant budding? You must not have nearly enough light if it wont stay in veg unless this is an auto strain? It does look like too much nitrogen is the cause here as stated by GrowinDad above