Why Are My Pea Pods Forming But With Very Few Peas Inside?

A fully formed pea pod that contains only one or two seeds instead of a normal complement of five to ten peas has experienced partial pollination or seed abortion after initial pod set. Unlike complete flower drop (where no pod forms at all), these pods started developing but the individual ovules within them were not all fertilised, or the developing seeds were aborted due to stress mid-development. The pod itself — the ovary wall — develops regardless of seed count, which is why you can have a normal-looking pod with almost nothing inside.

Pollination within the flower

Peas are self-pollinating — the anthers (pollen-producing structures) and stigma (pollen receptor) are enclosed within the same flower, and pollination typically occurs within the flower before it fully opens. Each ovule within the pod must receive a pollen grain to develop into a seed; an ovule that is not fertilised aborts. Very hot weather at flowering reduces pollen viability and may leave some ovules unfertilised. Similarly, flowers that open in extremely cold temperatures may have pollen that is slow or non-viable. Both extremes reduce seed count per pod.

Water stress during pod fill

Even when pollination is complete and all seeds start developing, drought stress during pod fill causes the developing seeds to abort. The plant prioritises survival when water is limited and sheds the most resource-intensive structures — developing seeds. The result is pods where seeds started developing, showed as small bumps, then dried and shrivelled inside a pod that continued to develop its outer wall. Regular, deep watering from flowering through to harvest prevents this. A soil moisture deficit of even a few days during this period can noticeably reduce seed count.

Late-season decline

At the end of the pea season, when the plant is aging and under the additional stress of powdery mildew, heat, or simply completion of its lifecycle, later flowers tend to produce underfilled pods. This is normal — harvest earlier pods first and accept that the last flush of the season will be thinner. To maximise yield, keep picking pods regularly from the moment they reach picking size; a pod left on the plant signals the plant that seed development is complete and reduces the urgency of filling subsequent pods.