Coral Island: Complete Greenhouse Guide

Unlocking the Greenhouse for your farm is the first step toward automation in Coral Island; here’s where to start.

In a game all about farming and growing plants, dealing with challenging weather can be quite troublesome. Fortunately, Coral Island offers a solution by providing players with a fully operational Greenhouse. This facility enables the cultivation of crops even during unfavorable weather conditions. Moreover, it serves as a protective space, keeping annoying crows away from your plants. This guide will help you unlock this crucial farming element and provide a list of the optimal plants to cultivate within it.

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How to Unlock the Greenhouse

After unlocking the Lake Temple, complete all six Offerings of the Crop Altar. The gifts include the Essential Resources, Ocean Loot, Summer Sesajen, Fall Sesajen, Spring Sesajen, and Winter Sesajen. This will add the Greenhouse to your farm with no other prerequisites. (You can find it next to the Nepenthes plant.)

Here are the two main phases of unlocking the Greenhouse:

Complete the Mythical Dreams Quest. This will give you access to the Lake Temple.
Complete the Crop Altar Offerings. Use the following table as a guide for collecting the required ingredients for each of the aforementioned offerings:

Offering	Ingredients
Essential Resources	10 Wood 10 Stone 10 Fiber 10 Sap 5 Maple Seeds 5 Oak Seeds 5 Pine Seeds
Spring Sesajen	1 Turnip 1 Carrot 1 Daisy 1 Wasabi 1 Morel
Summer Sesajen	1 Blueberry 1 Hot pepper 1 Sunflower 1 Shallot 1 Hibiscus
Fall Sesajen	1 Pumpkin 1 Rice 1 Orchid 1 Black trumpet 1 Fig
Winter Sesajen	1 Brussel sprouts 1 Kale 1 Rose hip 1 Snowdrop 1 Tea leaf
Ocean Loot	5 Sea salt 1 King scallop 1 Eastern oyster 1 Blue mussel 1 Green sea urchin

Offering

Ingredients

Essential Resources

10 Wood
10 Stone
10 Fiber
10 Sap
5 Maple Seeds
5 Oak Seeds
5 Pine Seeds

Spring Sesajen

1 Turnip
1 Carrot
1 Daisy
1 Wasabi
1 Morel

Summer Sesajen

1 Blueberry
1 Hot pepper
1 Sunflower
1 Shallot
1 Hibiscus

Fall Sesajen

1 Pumpkin
1 Rice
1 Orchid
1 Black trumpet
1 Fig

Winter Sesajen

1 Brussel sprouts
1 Kale
1 Rose hip
1 Snowdrop
1 Tea leaf

Ocean Loot

5 Sea salt
1 King scallop
1 Eastern oyster
1 Blue mussel
1 Green sea urchin

How to Use the Greenhouse

Since the Greenhouse is safe from adverse weather and pest pressure, you can plant any crops, plants, and trees in it. You will have 14×14 tiles ready for plantation, and there will be a freshwater spring in the back to help water your vegetation.

Regardless of the season, you can plant anything in the Greenhouse, provided that you have the seeds. This is ideal for keeping the production alive in wintertime when your farm becomes mostly unusable.