For the greenhouse you'll want to watch two specific unlock patterns depending on your approach. The community center path needs you to complete all pantry bundles where timing really matters - start collecting gold-quality crops as soon as possible since you need 5 each of parsnips melons pumpkins and corn. Watch the growing phases carefully, fertilizer helps hit gold quality faster but you'll need to time your plantings perfectly to catch seasonal windows. When gathering animal products focus on getting large milk and eggs first since those have specific quality requirements and take longer to obtain through animal happiness mechanics

The faster route runs through jojamart requiring exactly 40,000g total - 5,000g membership fee then 35,000g for the immediate unlock. Position yourself to maximize early profit crops and mining if taking this path since the gold threshold is your only barrier. The membership purchase triggers a specific cutscene with morris, after which the greenhouse option becomes available instantly in the purchase menu

A lesser-known timing detail: you can actually unlock the greenhouse before first winter hits if you plan crop rotations precisely. The quality crops bundle is usually the bottleneck so plant extra parsnips early, time melon growth for summer 14-28, then immediately start corn and pumpkins as fall begins. The traveling cart appears fridays and sundays which can accelerate rare bundle items especially for the artisan requirements just watch the rng patterns and keep 1000-2000g ready for good finds

The community center path takes longer but unlocks additional achievement flags and town restoration events while jojamart is purely mechanical speed at the cost of town development triggers. Time your approach based on your first-year goals and resource management style