Short answer: Use this Last Asylum: Plague Herb Garden calculator to total Wood, Grain, and Herb for any upgrade range before you spend speed-ups or alliance help.

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Upgrade calculator

Herb Garden

Each row is one upgrade: level N → N+1. Totals sum wood, grain, herbs, and base build time for steps we have in the guide. Level pickers run through 30; if your target is above the last level with data (currently 30), totals only cover upgrades through that level.

*data can be incorrect too, please verify it before using

Totals for levels 1 → 2

Wood

135

Grain

135

Herbs

0

Time

38s

Steps

1

Planning an upgrade? Share this calculator with your alliance so everyone can compare resource costs.

Community post (copy & paste)

I made a Herb Garden upgrade calculator for Last Asylum: Plague players who want to see the total Wood, Grain, and Herb cost before committing. It covers level-to-level planning and is free to use.

Data compiled for Last Asylum Guide · Maintainer: Slaughter Queen · Game balance may change with patches.

About Herb Garden

Priority: Medium

The Herb Garden produces herbs used in troop healing, antitoxin crafting, and certain research paths. Herbs are often the scarcest resource in the mid-to-late game, making the Herb Garden an underrated but critical building to upgrade.

Upgrade Tips

  • 1Herbs are consumed heavily in the Infirmary — a strong Herb Garden means faster troop recovery after battles.
  • 2Don't neglect the Herb Garden in favour of Farm and Lumberyard — all three need to scale together.
  • 3Upgrade Herb Storage alongside Herb Garden so the extra production doesn't go to waste.