Method number 1: for plants in clay pots (7-10 days)
If you keep indoor plants in clay pots, then each pot can be wrapped in moss - both the moss and the plant are abundantly moistened. If there is no moss nearby, place a clay pot in a large plastic pot, and place a dampened expanded clay in the space between the walls of the pots. This method is effective if the plants are left for 7-10 days.
Method number 2: for plants in plastic pots
In plastic pots, the soil is covered from above with moist moss or expanded clay. Watered plants can be placed on trays, deep trays, or wide basins of water so that the bottom of the pot is submerged. This method is effective for moisture-loving plants.
Method number 3: watering through the "wick"
A wick is twisted from a thick woolen thread, bandage, or strip of fabric. One end of the wick is placed on the surface of the ground in a pot, and the other is lowered into a container of water, while the container with water should be located above the flower pot. Thus, the wick will get wet on one side from one side and the moisture will pass to the end of the wick that is in the pot. Care should be taken to get the correct number of wicks for given pot size. So for a pot with a diameter of 10 cm, one wick is enough, and for a pot with a diameter of 25-30 cm, 3-4 wicks are needed for a sufficient supply of water. By the way, special synthetic wicks are also sold in flower shops.
Method number 4:moisturizing through the fabric
Lay a cloth soaked in water on the oilcloth (cloth, felt, an old baby blanket folded in several layers of batting). Place the pots with already watered plants on the cloth; dip the end of the cloth into a container of water. Moisture will pass through the fabric to the pots. The pots must have drainage holes; saucers are not needed. Wet plants will release water and plants will absorb water through the drainage holes. This method is suitable for a period of 10-20 days.
Method number 5: watering through the "wick" at the bottom of the pot.
All you need is your flower pot and another container that you can place under the pot. Make holes in the pot and thread the string as shown. Place the pot on the suck with water so that the rope sinks into the water. Water along the rope will rise up and moisten the ground.
Method number 6: automatic irrigation systems.
Remember that all these methods are designed for a maximum of three to four weeks of your absence. If you have to leave for a longer period, then you cannot do without complex store-based automatic irrigation systems. Now you can buy them in any flower shop in the city: they represent a container with water, a set of thin tubes and a control system that ensures that the water supply is turned on at regular intervals, for example, 2 times a day.