It is generally not advisable to cut wet plants with hedge shears if you can avoid it. Cutting wet plants can have several negative effects, both on the plants and on the tools themselves. Here's why it's better to avoid cutting wet plants:

1.Spread of Disease: Trimming wet plants can potentially spread diseases from one plant to another. Moisture on the blades can transfer fungal spores or bacteria from one plant to another, leading to the spread of infections.
2.Blade Damage: Wet plant material can be more difficult to cut cleanly. The excess moisture can cause the blades of the hedge shears to stick together, resulting in tearing or bruising of the plant stems, rather than a clean, precise cut. This can lead to a jagged, uneven appearance in the hedge.
3.Rust Formation: Cutting wet plants can lead to the transfer of moisture onto the blades of the hedge shears, increasing the risk of rust formation, especially if the shears are not promptly dried and maintained properly.
4.Reduced Efficiency: Wet plant material can clog the blades of the hedge shears, reducing their efficiency and making the cutting process more challenging. This can slow down your work and require more effort to achieve the desired results.

Whenever possible, it's best to wait for the plants to dry before trimming them. This allows for cleaner cuts, reduces the risk of disease transmission, and helps to preserve the sharpness and condition of your hedge shears. If you must trim wet plants, be sure to clean and dry your shears thoroughly afterward, and consider applying a light coating of lubricating oil to protect them from moisture and prevent rust formation.