You can grow plants in pots without drainage holes by keeping them in the plastic pot they came in and placing that in the bigger pot.
You can also add a base layer of rocks, Leca, or Smart Gravel to keep the soil away from the excess moisture.
You can cover drainage holes with rocks or gardening sheets that let through water freely.
This will help you to keep the soil in, but let the excess moisture drain away.
You can provide drainage for pots without drainage holes by adding a base layer of rocks, Leca, or Smart Gravel.
This keeps the plant and soil away from the water at the bottom of the pot.
You can make drainage holes in plastic pots by drilling a hole at the lowest setting.
If you do a higher setting you risk cracking the pot.
You can drill holes in your pots if you want a drainage hole.
You can also choose to add a base layer of rocks, Leca, or Smart Gravel to provide great drainage for pots without a drainage hole.
The size of the drainage holes shouldn't be much larger than an inch (2.
5 cm).
If you need more drainage you can add more drainage holes or add Leca and Smart Gravel as a base layer in the pot.