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Milk Snake — care sheet
Lampropeltis triangulum · Beginner
| Adult size | Varies by subspecies — roughly 2–4 ft (tropical Honduran and black milk snakes can reach 4–5 ft) |
|---|---|
| Lifespan | 20+ years |
| Enclosure | Adult minimum 4×2×2 ft (48×24×24 in); juveniles can start smaller and be grown up. A tight, locking lid is essential (colubrid escape artists), and — as with kingsnakes — house one per enclosure. |
| Basking / warm zone | Warm/basking surface 85–90°F (29–32°C) from an overhead heat source on a thermostat. |
| Cool side | Cool side 75–80°F (23–27°C), giving a full warm-to-cool gradient with hides on both ends. |
| Night | Night 70–75°F (21–23°C); if your home drops below that, use a ceramic heat emitter or radiant panel on a thermostat — never a coloured night bulb. |
| UVB & lighting | UVB is recommended: a T5 HO bulb (e.g. Arcadia Forest 6%) giving UVI 2.0–3.0 at the basking spot (Ferguson Zone 2). Replace yearly. |
| Humidity | Average 40–60% — but subspecies-dependent: tropical types (Honduran, black milk snakes) want more, around 60–80%. Identify your subspecies and match it. Humidity naturally runs higher on the cool end and at night. |
| Substrate | A naturalistic substrate about 4″ deep that supports moderate humidity (soil/coco mixes, cypress mulch, aspen for drier types). Avoid pine and cedar. |
| Diet | Carnivore — appropriately-sized frozen/thawed rodents (roughly the width of the snake at its thickest). Babies start on pinky mice about 1–2×/week, easing to once a week as they grow; adults eat weekly to every other week depending on size and body condition. |
| Supplements | None needed — whole-prey rodents are a complete diet. |
Before you buy
- A 4×2×2 ft enclosure with a secure, locking lid.
- Which subspecies you’re getting — it sets the adult size and the humidity target.
- Comfort feeding frozen/thawed rodents (never live).
- One snake per enclosure, and a 20+ year commitment.
See a reptile vet if…
- Open-mouth breathing, wheezing, or mucus (possible respiratory infection).
- Regurgitating meals, or refusing food with real weight loss.
- Repeated stuck sheds or retained eye caps.
- Mites (tiny moving specks) or cheesy matter in the mouth (possible mouth rot).
- Any tissue protruding from the vent (prolapse).
Never
- Never house two milk snakes together — like kingsnakes, they can eat other snakes.
- Never feed live rodents — use frozen/thawed.
- Never use pine or cedar substrate.
- Never trust a loose lid, and never handle for ~48 hours after a meal.
Common milk snake questions
How hard are Milk Snakes to keep — are they good for beginners?
Beginner. As beginner-friendly as its kingsnake cousin. The one thing to check is which subspecies you have — they vary a lot in adult size and preferred humidity.
What do Milk Snakes eat?
Carnivore — appropriately-sized frozen/thawed rodents (roughly the width of the snake at its thickest). Babies start on pinky mice about 1–2×/week, easing to once a week as they grow; adults eat weekly to every other week depending on size and body condition.
How big an enclosure do Milk Snakes need?
Adult minimum 4×2×2 ft (48×24×24 in); juveniles can start smaller and be grown up. A tight, locking lid is essential (colubrid escape artists), and — as with kingsnakes — house one per enclosure.
What basking temperature do Milk Snakes need?
Warm/basking surface 85–90°F (29–32°C) from an overhead heat source on a thermostat.
What should the cool side be for Milk Snakes?
Cool side 75–80°F (23–27°C), giving a full warm-to-cool gradient with hides on both ends.
What night-time temperature do Milk Snakes need?
Night 70–75°F (21–23°C); if your home drops below that, use a ceramic heat emitter or radiant panel on a thermostat — never a coloured night bulb.
What UVB and lighting do Milk Snakes need?
UVB is recommended: a T5 HO bulb (e.g. Arcadia Forest 6%) giving UVI 2.0–3.0 at the basking spot (Ferguson Zone 2). Replace yearly.
What humidity do Milk Snakes need?
Average 40–60% — but subspecies-dependent: tropical types (Honduran, black milk snakes) want more, around 60–80%. Identify your subspecies and match it. Humidity naturally runs higher on the cool end and at night.
What substrate do Milk Snakes need?
A naturalistic substrate about 4″ deep that supports moderate humidity (soil/coco mixes, cypress mulch, aspen for drier types). Avoid pine and cedar.
What supplements do Milk Snakes need?
None needed — whole-prey rodents are a complete diet.
How big do Milk Snakes get?
Varies by subspecies — roughly 2–4 ft (tropical Honduran and black milk snakes can reach 4–5 ft)
How long do Milk Snakes live?
20+ years
What are the signs Milk Snakes are sick or need a vet?
See a reptile or exotics vet if you notice: Open-mouth breathing, wheezing, or mucus (possible respiratory infection).; Regurgitating meals, or refusing food with real weight loss.; Repeated stuck sheds or retained eye caps.; Mites (tiny moving specks) or cheesy matter in the mouth (possible mouth rot).; Any tissue protruding from the vent (prolapse)..
Sources: ReptiFiles — Milksnake Care Sheet · Baines et al. (2016), “How much UVB does my reptile need? The UV-Tool” · Association of Reptilian & Amphibian Veterinarians (ARAV) · Merck Veterinary Manual — reptiles. Written and fact-checked by The Baskden Team — kind, general guidance, not a diagnosisand not a substitute for an exotics vet. baskden.com