Zucchini Leaves Turning Yellow: Reasons For Yellow Leaves On Zucchini. Zucchini plants are one of the most prolific and easy crops to grow. They grow so rapidly they can almost overtake the garden with their rambling vines heavy with fruit and their large shading leaves. A common problem is yellowing zucchini leaves.
In respect to this, why is my squash plants turning yellow and dying?
Destroy the plants and don't compost them. Don't plant squash or other cucurbit vines in that location next year, as the bacterial wilt will still be in the soil and will infect them as well. As stated above, the leaves on squash plants will turn yellow any time the plant is stressed.
Why is my zucchini rotting?
Blossom End Rot is a disease common to Zucchini, which causes the blossom end of the fruit to rot. Blossom-end rot is caused by a lack of calcium in the developing fruit." So either the plant is not absorbing enough calcium from the soil or the soil doesn't have enough calcium in it to start with.