I've created a peaceful garden simulation game with all the requested features:

**Core Features:**
- 🌱 **Various flower types** with different rarities (common, rare, legendary)
- 🌦️ **Weather system** (sunny, rainy, cloudy, windy) affecting growth
- 🌸 **Seasonal changes** every 28 days with bonuses
- ⏰ **Time-based growth** mechanics with day/night cycle
- 📤 **Sharing system** - export/import garden layouts via codes

**Flower Varieties:**
- Common: Rose, Tulip, Sunflower
- Rare: Lily, Orchid, Bluebell
- Legendary: Lotus

**Gameplay:**
- Plant seeds in 12x12 grid
- Water plants daily to promote growth
- Harvest mature flowers for coins
- Buy more seeds and decorations in shop
- Weather affects growth speed
- Spring season bonus seeds

**UI Elements:**
- Top bar: coins, weather, season, day counter, time
- Side inventory: seeds and decorations with counts
- Bottom controls: plant, water, harvest, shop, achievements, share
- Pixel art flowers with growth stages

**Additional Features:**
- 🏆 8 achievements to unlock
- 🎨 Decorations (rocks, fences, lanterns, fountains, gnomes, benches)
- 💰 Economy system - earn coins by harvesting
- 🎵 Gentle sound effects for actions
- 📱 Touch controls with pinch-to-zoom support
- 🌈 Soft, earthy color palette as specified
- ✨ Particle effects for visual feedback
- 🎁 Weekly rare seed bonuses

The game autosaves progress and creates a peaceful, meditative gardening experience!