How to Fertilize Cucumber

When Should I Start Feeding My Cucumber?

How Often Should I Fertilize My Cucumber?

Feed every one to two weeks once the vines are established. Cucumbers grow rapidly and set fruit continuously, so they burn through nutrients fast.

Start fertilizing about a week after transplanting, or when seedlings have their first true leaves. Continue through the entire harvest period until the plant declines in fall.

If leaves turn yellow from the bottom up, the plant is running low on nitrogen. If flowers drop without setting fruit, it may need more phosphorus and potassium. Adjust your formula based on what you see.

What Is the Best Fertilizer for Cucumber?

Cucumbers need two phases of feeding. At planting, use a balanced fertilizer like 10-10-10 to support strong vine and leaf growth. Once the first flowers appear, switch to a formula with more potassium and phosphorus, like 5-10-10, to support fruit production.

Liquid fertilizer works well because you can adjust the dose easily and it reaches the roots quickly. Granular slow-release fertilizer mixed into the soil at planting is also effective as a base layer.

Cucumbers are annual plants that grow fast and produce heavily. They need more fertilizer than most garden vegetables, so don't be shy about feeding on schedule.

How Do I Fertilize My Cucumber?