Great — here are carefully selected luxury eco-retreats in Sri Lanka that emphasize sustainability and serve organic / farm‑to‑table dining. I’ve included a short description, why each is eco‑focused, their dining highlights, region, and a citation for the information.

Note: I looked these up to confirm current descriptions and sustainability/dining claims. If you want direct booking links or specific availability for travel dates, I can check those next.

Top picks

1. Ulagalla by Uga Escapes (Anuradhapura / Cultural Triangle) — luxury villas on a 58‑acre nature sanctuary; on‑site organic garden supplies produce and the kitchen offers authentic regional dishes and private dining experiences. Eco strengths: large nature sanctuary, use of local produce, resident naturalists and community engagement. Price level: luxury (private villas, many with plunge pools). (luxurylifestyleawards.com)

2. Tri Lanka (Koggala Lake, South coast) — boutique eco‑luxury retreat built with sustainability in mind; seasonal, organic fusion cuisine served overlooking the lake; focuses on mindfulness and nature immersion. Eco strengths: eco‑architecture, emphasis on local/seasonal produce and low‑impact design. Price level: upscale boutique. (hidmc.com)

3. Kalundewa Retreat (near Dambulla / Cultural Triangle) — intimate luxury retreat set among paddy fields and lake; maintains an organic garden used in the main restaurant and offers al‑fresco farm‑to‑table dining experiences. Eco strengths: on‑site organic garden, large estate with agro‑biodiversity and community experiences. Price level: upper‑upscale boutique. (go-srilanka.com)

4. Madulkelle Tea & Eco Lodge (Knuckles Range) — eco‑lodge in the tea country/Knuckles Mountains with an open‑air restaurant using organic vegetables and herbs grown on the property; great for nature walks, birding and mountain views. Eco strengths: small‑scale, garden‑to‑table dining and conservation of mountain landscape. Price level: boutique luxury. (srilankawildroom.com)

5. The Mudhouse (Anamaduwa / off‑grid) — rustic, off‑grid eco‑retreat focused on farm‑to‑table, traditional clay‑pot cooking and organic produce (a high share of food comes from their farm). More intimate and experiential than polished luxury hotels — best if you want deep immersion in sustainable living. Price level: mid to boutique, experiential. (srilankawildroom.com)

6. Ravana Garden (Ambalantota / Southern coast) — marketed as a sustainable luxury hotel and wellness retreat with vertical/horizontal organic gardens, dosha‑specific organic meals and reduced menu items with unsustainable ingredients. Eco strengths: on‑site organic gardens and wellness programs. Price level: upscale wellness boutique. (tripaneer.com)

7. Rainforest Ecolodge (near Sinharaja / southwest rainforest) — eco‑lodge close to Sinharaja UNESCO forest; offers suites built with natural materials and an on‑site organic garden supplying the restaurant (fresh local fare). Eco strengths: proximity to protected forest, low‑impact construction, garden‑to‑table meals. Price level: boutique eco‑lodge. (iru.world)

8. Back of Beyond / Yala Dune Camp (Yala region) — luxury glamping with strong sustainability focus and minimal environmental footprint; combines wildlife excursions with locally sourced food and eco practices. Great if you want luxury wildlife + eco credentials. Price level: luxury glamping. (ecolodgesanywhere.com)

Quick tips for choosing and booking

• Region matters: for beaches and coastal Ayurveda choose the south (Tangalle, Galle, Koggala); for wildlife choose Yala/ southeast; for cultural sites choose the Cultural Triangle (Sigiriya/Anuradhapura); for rainforest/birding choose Sinharaja or Knuckles. (Listings above note regions.) (luxurylifestyleawards.com)
• Ask the property before booking: how much of the food is sourced from their gardens vs. local farmers, specific sustainability certifications (if any), single‑use plastic policies, and whether they support local communities. These details vary by property and can change year to year.
• Dietary needs: most of these properties can accommodate vegetarian/vegan and special diets, but confirm in advance. Many emphasize Sri Lankan dishes (rice, curries, hoppers) prepared from seasonal produce. (srilankawildroom.com)

Would you like:

• a short list narrowed to a particular region (south coast, Cultural Triangle, rainforest, or wildlife), or
• current availability and sample rates for specific dates (I can check prices/availability for your travel dates), or
• help booking or comparing two of these for your travel preferences (wellness vs. wildlife vs. culture)?

Which option would you like me to do next?