To find the total number of pumpkins Pauly Pumpkin grew in the 30 days before Halloween, we can multiply the number of pumpkins he grew each day by the number of days.
Pauly grows 26 pumpkins per day, and there are 30 days before Halloween:
\[ 26 \text{ pumpkins/day} \times 30 \text{ days} = 780 \text{ pumpkins} \]
Therefore, Pauly Pumpkin grew a total of 780 pumpkins in the 30 days before Halloween.