Choking risk
Raw cucumber is a moderate choking risk - it's firm and slippery, and round coins are an easy shape to block the airway.
Serve cucumber as a large, grippable spear or thin baton, never as rounds or coins, and peel the firm skin and scoop the seedy core for younger babies. See how to serve for age-by-age prep.
Allergens
Cucumber is not a common food allergen, so a true food allergy to it is rare.[3]
Start with a small amount and watch for a reaction.
If baby refuses
Cucumber is mild and watery, so it can read as boring. Pair it with a dip like hummus, cream cheese, or plain whole-milk yogurt, or stir grated cucumber through yogurt. A chilled spear can be more tempting while baby is teething.
How to serve
6+ months old

Large peeled spear
Finger-length spear, about as thick as an adult finger
Cut a large, finger-length spear baby can grip in a fist and gnaw at the end. Peel the firm skin and scoop out the watery, seedy core so the spear holds its shape and is easier to chew. Keep it thick enough that it does not flop over. Grated cucumber stirred into yogurt is another easy way to serve it at this stage.
How to cook
No cooking needed. Peel, remove the seedy core, and cut into thick spears. Chilling a spear in the fridge first can soothe sore gums.
9+ months old

Small soft quarters or grated
About 1/2 inch, bite-sized
As the pincer grasp develops, offer small bite-sized pieces of peeled cucumber alongside a spear baby can still hold. Grated cucumber is easy to manage now.
Keep avoiding raw rounds and coins, which break off into hard pieces too easily.
How to cook
No cooking needed. Peel, then grate or cut into small pieces. Grated cucumber can be stirred through plain whole-milk yogurt.
12+ months old

Thin batons or thin slices
Offer cucumber as thin slices or thin batons your toddler can pick up and bite. The skin can stay on now that chewing is more established, which keeps in most of the vitamin K. Keep cutting it into batons rather than thick round coins or chunks, since raw cucumber stays a food to cut carefully through the toddler years.
How to cook
No cooking needed. Pairs well with a dip like hummus, cream cheese, or plain whole-milk yogurt.
Sources
- When, What, and How to Introduce Solid Foods - CDC
- Choking Hazards (Infant & Toddler Nutrition) - CDC
- Food Allergies (the 9 major US allergens) - FDA
- Pollen Food Allergy Syndrome - ACAAI
- Melon allergy in ragweed-allergic subjects - PubMed 21262100
- Allergy to pumpkin and cross-reactivity to other Cucurbitaceae - PubMed 10932088
- Cucumber, with peel, raw (FDC 168409) - USDA FoodData Central
