I just started trying to root cuttings in a hydroponic cloning system I built. Is there any way I can keep my cutting humid indoors? Thanks.
For hydroponics, it is recommended that you start your plants in a separate container and then transplant them into your system. The best method for keeping them humid is to place the plant itself in a plastic bag and use rooting hormone on the stem to start the plant. This keeps the hormone in one place and prevents the cutting from drying out. Another method is running root hormone through your hydroponics system and rooting all of your cuttings at once the cutting will stay humid because it is a hydroponic system and the water evaporating keeps the plant green. This gets expensive tho and is recommended for industrial applications. Then the third method depends on the type of plant you are growing because there are some tricks there too.
When new cuttings are inserted into a hydroponic system for cloning, they can look fine for a few days and then start to wilt even though they are immersed in nutrient solution. This wilting can be caused by too strong a nutrient solution. Cloned plants don't have a root system yet, so they lack a way to regulate water and nutrient uptake. Water is a clone's primary need until roots form. Water is required for circulation and structure. When root buds form, gradually increase nutrients to normal levels. I start my tomato clones in mason jars with the node immediately above the cut immersed in about 1" of very dilute nutrient solution (no deeper). Once roots start to grow, I move the clone in with the other plants. Ambient humidity is about 50-60%, so I do not use a humidifier.