Gardeners 

The "Gardeners o’ Deep" offers an intriguing and contrast-filled theme. A cult devoted to the cultivation and nurturing of life, especially in areas where conditions might be challenging or unexpected, brings forth a unique niche. Here’s an expansion on their identity and practices:

1. **Deep-sea Agriculture**: Despite the name suggesting the ocean's depths, these gardeners might have figured out ways to grow crops in underwater greenhouses or specialized pods. Such facilities would utilize hydrothermal vents or unique minerals found deep within the ocean for nourishment.

2. **Hybrid Crops**: Given their unique environment, the crops they grow might be hybrids—capable of thriving in both terrestrial and aquatic conditions. These crops might be highly sought after due to their nutritive properties.

3. **Beekeepers of the Abyss**: Cultivating bees deep underwater or in underground caverns sounds fantastical. They might have specialized, bioluminescent bees adapted to pollinate deep-sea plants, producing a unique type of honey with potent medicinal properties.

4. **Bioluminescent Gardens**: A signature trait could be their bioluminescent gardens that glow in the dark. These gardens might not only be a source of food but also act as lighthouses or markers for navigation.

5. **Soil Alchemists**: They'd be masters at rejuvenating and enriching the soil, transforming barren lands into fertile grounds. Their knowledge would be a blend of science, ancient practices, and deep-sea minerals.

6. **Floral Diplomacy**: They could use rare flowers and plants as diplomatic gifts or tokens of peace, establishing them as not just cultivators but also as mediators and peacekeepers.

7. **Ceremonies and Rituals**: The act of planting and cultivation could be ritualized. They might have ceremonies to honor the depths, the soil, and the life they nurture.

8. **Defensive Growth**: For defense, they might employ rapid-growth plants or corals, able to quickly create barriers or entangle foes. Think of them as "natural traps" that can be sprung in moments of danger.

9. **Ecosystem Balance**: The Gardeners would have an innate understanding of ecosystems and would strive to maintain a balance, ensuring that their agricultural practices are sustainable and harmonious.

10. **Herblore and Medicine**: Given their intimate relationship with plants, they'd likely be adept at creating medicines, potions, and poisons. They'd have a vast knowledge of herblore, making them invaluable healers.

11. **Trade and Prosperity**: The unique resources they cultivate could make them a vital trade hub. They'd have a network of alliances and trade pacts, ensuring their prosperity and influence.

The "Gardeners o’ Deep" become a symbol of life, resilience, and balance, cultivating the very essence of existence in the harshest of conditions. They are not just gardeners, but also keepers of ancient wisdom, healers, and a beacon of hope in the dark depths.