Great — here are top eco-conscious honeymoon stays across Sri Lanka (island-wide choices so you can mix beach, wildlife and hill-country). For each I list location, why it’s eco-conscious, honeymoon vibe, and a quick tip. I’ve cited sources for the key claims so you can check details and book.

Top eco-conscious honeymoon stays in Sri Lanka

1. Jetwing Vil Uyana — Sigiriya / Cultural Triangle

• Why eco-conscious: built as an eco-haven with villas set across wetlands, paddy, forest and marsh; strong emphasis on habitat restoration and low-impact design. (honeymoonguidesrilanka.com)
• Honeymoon vibe: private, intimate chalets (some with plunge pools), wildlife and sunrise views of the cultural plains — great after a Sigiriya visit.
• Tip: choose Marsh or Water chalets for maximum privacy and views.

2. Wild Coast Tented Lodge (Relais & Châteaux) — Yala / southeast wildlife belt

• Why eco-conscious: low-footprint tented architecture integrated with the natural landscape and wildlife viewing; promotes nature-immersive stays. (honeymoonguidesrilanka.com)
• Honeymoon vibe: safari-style luxury with secluded tent “cocoons,” private decks and strong safari/photo opportunities.
• Tip: combine with a private Yala game drive at dawn for best wildlife viewing.

3. Uga Ulagalla — Anuradhapura / Cultural Triangle

• Why eco-conscious: restored 19th‑century manor on large grounds, promotes organic cultivation and village/community experiences. (honeymoonguidesrilanka.com)
• Honeymoon vibe: private pool villas, tranquil paddy-field setting, romantic private dining by the lake.
• Tip: add a cycling or village experience (rice harvesting/boat trips) for authentic local immersion.

4. 98 Acres Resort & Spa — Ella / Hill Country

• Why eco-conscious: built on a working tea estate using locally-sourced/recyclable materials, blends into the landscape and supports estate-based activities. (farandwild.travel)
• Honeymoon vibe: dramatic hill-country views, cozy villas and tea‑estate walks — ideal for couples who love scenery and tea tours.
• Tip: request a terrace villa facing Little Adam’s Peak at sunrise.

5. Santani Wellness Resort & Spa — Near Kandy / Mountains

• Why eco-conscious: wellness-focused, minimalist eco-lodges, emphasis on organic food, low-impact operations and wellbeing programs. (hidmc.com)
• Honeymoon vibe: detox/wellness retreat with private modern villas and couples’ spa therapies.
• Tip: book a couples’ spa package and include guided nature hikes.

6. Tri Lanka — Koggala Lake / South Coast (near Galle)

• Why eco-conscious: sustainable design features (green roofs, living walls, recycled/jak wood materials), small-boutique scale minimizing impact. (farandwild.travel)
• Honeymoon vibe: serene lakeside retreat, yoga/meditation focus, intimate private dining.
• Tip: combine with a Galle Fort day trip and a short coastal beach day.

7. Aarunya Nature Resort — Kandy foothills / Knuckles Range

• Why eco-conscious: runs an on-site foundation for conservation/CSR, emphasizes private pool villas, natural building practices and community projects. (aarunyaresort.com)
• Honeymoon vibe: mountain views, wellness/spa and seclusion.
• Tip: ideal for couples wanting privacy with easy access to Kandy cultural sites.

8. Chena Huts by Uga Escapes — Near Yala / Hambantota coast

• Why eco-conscious: small-scale, nature-integrated architecture, emphasis on low-impact operations and wildlife-friendly design. (Noted widely among eco-safari properties in the Yala area.) (hidmc.com)
• Honeymoon vibe: rustic-luxe beach and wild-coast combo — good for couples who want beach + safari.

9. Tri / Ravana Garden & small eco-lodges (examples) — Southern coast & Ussangoda area

• Why eco-conscious: several newer boutique properties (Ravana Garden, Kaju Green, Parangi/Thema Collection properties) prioritise local materials, garden/permaculture and small footprint approaches. Check each property’s sustainability pages for details. (dobbernationloves.com)
• Honeymoon vibe: quiet beachside and rural coastal charm, good for off‑the‑beaten‑path couples.

10. Ulpotha / off-grid Ayurveda retreats — Kurunegala / interior

• Why eco-conscious: genuine off‑grid living, solar/low-energy, farm-to-table and traditional building methods — ideal if you want unplugged, authentic sustainability. (hidmc.com)
• Honeymoon vibe: rustic, deeply local and spiritual — best for couples seeking a simple, restorative experience.

Quick planning notes and booking tips

• Mix landscapes: Sri Lanka is compact — combine a hill-country stay (Ella/Kandy) + wildlife (Yala or Wilpattu) + a southern beach (Tangalle/Galle) for a varied honeymoon.
• Best seasons: south/southeast beaches (Tangalle/Yala) are best December–March; Hill country (Ella/Nuwara Eliya) is pleasant year-round but cooler; Yala wildlife is best in the dry season (typically February–June) — check exact seasonal forecasts for your dates. (Seasons can vary; confirm for the months you plan to travel.)
• Responsible booking: ask each property about their sustainability certifications/initiatives (solar, water management, waste, community projects, local sourcing) before booking if that’s important to you. Many boutique eco-lodges publish CSR or sustainability pages. (aarunyaresort.com)
• Transportation: internal transfers (car/driver) are common — ask hotels about low-impact transfer options and combined transfers to reduce mileage.
• Honeymoon add-ons: most properties offer private dining, couples’ spa packages and excursions — request these when booking to guarantee availability.

Would you like a short 5–7 day sample honeymoon itinerary (with one beach, one wildlife and one hill-country stay) using two or three of these properties and estimated budgets? I can tailor it to your travel dates, style and budget.