Had to harvest the lower buds because of aphids... Rest looks great though.
Will harvest this week
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Set up cost (fixed costs)
-Lamp: 40€
-Timer: 3,5€
-Pot: 4€
-Total fixed costs: 47,5€
Given 5 years (or 15 grows) usage time translates to around 3,17€ per grow in materials.
Variable costs:
-Seed: 10€
-Soil: 6€
-Fertilizer: 3,50€
-Power (100 days 20h/day): ~28,8€ (exact figure after harvest)
-Total variable costs: ~48,3€
-Total costs per grow: ~51,47€