Pumpkins need rich soil and adequate moisture to fill out. Approximately 7 seeds/gram.
Hints:

Sow 4-5 seeds 2 cm [1"] deep in hills 2 m [6'] apart.

Thin to the two or three strongest plants.

Atlantic Giant - 120 days. This strain was developed for World Record Contests. Has produced fruits up to 272 kg (600lbs) and 3 m (10') in circumference. Nice orange color. Approximate Seeds Per Gram - 3 to 5. Seeding Rate - 30 grams per 100 ft row, or 1.8 kg per acre