Planting food is more cost efficient than purchasing, but the benefit to purchasing food is that it is quicker, you do not have to wait for the food to be ready to harvest.
Listed below are all of the available food items in Tunnel Town, along with costs of their seed (cost to plant and harvest on your own), time required to harvest, price to buy ready-made, sell price, energy it provides, and the XP it provides (experience).
Carrots 2 5
Seed Cost: 0 | Harvest Time: 30 seconds
Buy Price: 50 gems | Sell Value: 2 gems
Seed Cost: 0 | Harvest Time: 30 seconds
Buy Price: 50 gems | Sell Value: 2 gems
Green Leaf Lettuce 3 10
Seed Cost: 5 gems | Harvest Time: 1 minute
Buy Price: 115 gems | Sell Value: 25 gems
Seed Cost: 5 gems | Harvest Time: 1 minute
Buy Price: 115 gems | Sell Value: 25 gems
Radish 3 25
Seed Cost: 15 gems | Harvest Time: 5 minutes
Buy Price: 300 gems | Sell Value: 60 gems
Seed Cost: 15 gems | Harvest Time: 5 minutes
Buy Price: 300 gems | Sell Value: 60 gems
Green Peppers 4 35
Seed Cost: 25 gems | Harvest Time: 10 minutes
Buy Price: 525 gems | Sell Value: 105 gems
Seed Cost: 25 gems | Harvest Time: 10 minutes
Buy Price: 525 gems | Sell Value: 105 gems
Celery 1 50
Seed Cost: 60 gems | Harvest Time: 30 minutes
Buy Price: 750 gems | Sell Value: 150 gems
Seed Cost: 60 gems | Harvest Time: 30 minutes
Buy Price: 750 gems | Sell Value: 150 gems
Strawberries 5 75
Seed Cost: 125 gems | Harvest Time: 1 hour
Buy Price: 1,250 gems | Sell Value: 250 gems
Seed Cost: 125 gems | Harvest Time: 1 hour
Buy Price: 1,250 gems | Sell Value: 250 gems
Yellow Squash 6 100
Seed Cost: 200 gems | Harvest Time: 1.5 hour
Buy Price: 1,850 gems | Sell Value: 370 gems
Seed Cost: 200 gems | Harvest Time: 1.5 hour
Buy Price: 1,850 gems | Sell Value: 370 gems
Bok Choy 8 110
Seed Cost: 350 gems | Harvest Time: 2 hour
Buy Price: 2,500 gems | Sell Value: 500 gems
Seed Cost: 350 gems | Harvest Time: 2 hour
Buy Price: 2,500 gems | Sell Value: 500 gems
Red Peppers 8 120
Seed Cost: 400 gems | Harvest Time: 2 hour
Buy Price: 3,250 gems | Sell Value: 650 gems
Seed Cost: 400 gems | Harvest Time: 2 hour
Buy Price: 3,250 gems | Sell Value: 650 gems
Eggplant 10 130
Seed Cost: 625 gems | Harvest Time: 4 hour
Buy Price: 5,000 gems | Sell Value: 1,000 gems
Seed Cost: 625 gems | Harvest Time: 4 hour
Buy Price: 5,000 gems | Sell Value: 1,000 gems
Red Leaf Lettuce 12 150
Seed Cost: 875 gems | Harvest Time: 5 hour
Buy Price: 6,250 gems | Sell Value: 1,250 gems
Seed Cost: 875 gems | Harvest Time: 5 hour
Buy Price: 6,250 gems | Sell Value: 1,250 gems
Melon 15 200
Seed Cost: 1,250 gems | Harvest Time: 6 hour
Buy Price: 8,750 gems | Sell Value: 1,750 gems
Seed Cost: 1,250 gems | Harvest Time: 6 hour
Buy Price: 8,750 gems | Sell Value: 1,750 gems
Yellow Peppers 17 225
Seed Cost: 1,500 gems | Harvest Time: 8 hour
Buy Price: 10,000 gems | Sell Value: 2,215 gems
Seed Cost: 1,500 gems | Harvest Time: 8 hour
Buy Price: 10,000 gems | Sell Value: 2,215 gems
Zucchini 20 280
Seed Cost: 1,750 gems | Harvest Time: 14 hour
Buy Price: 12,500 gems | Sell Value: _____ gems
Seed Cost: 1,750 gems | Harvest Time: 14 hour
Buy Price: 12,500 gems | Sell Value: _____ gems
Pineapple 22 300
Seed Cost: 2,125 gems | Harvest Time: 18 hour
Buy Price: 15,000 gems | Sell Value: ____ gems
Seed Cost: 2,125 gems | Harvest Time: 18 hour
Buy Price: 15,000 gems | Sell Value: ____ gems
Pumpkin 25 350
Seed Cost: 2,500 gems | Harvest Time: 24 hour
Buy Price: 20,000 gems | Sell Value: 4,000 gems
Seed Cost: 2,500 gems | Harvest Time: 24 hour
Buy Price: 20,000 gems | Sell Value: 4,000 gems
Purple Carrots 50 1000
Seed Cost: 1 star | Harvest Time: 2 hour
Buy Price: 3 stars | Sell Value: 1,000 gems
Seed Cost: 1 star | Harvest Time: 2 hour
Buy Price: 3 stars | Sell Value: 1,000 gems