You selected the perfect garden planter, you researched and purchased the best kinds of plants and now you ask, When is the best time to water? Good question. You want to make sure when it comes to watering your potted plants you get it right. Of course we all know that too much or too little can kill most plants and make those garden planters look pretty bad.
First you must make sure that your garden pottery has drain holes. Even succulents & cacti don't like to sit in standing water. Then early morning is the best time to water your planters. This is because the sun is barely up and the temps are still pretty cool. Now is the time that water can penetrate the soil and get down to the roots before being evaporated by the sun & heat.
Watering your planter early also means that the plants will have time to soak up and store some of the water before they are dried out and waiting in the afternoon. Don't believe that spraying the leaves of the potted plants and then having the full sun hit them will scorch them or cause burning. That is simply not true.
The second best time to water your potted garden planters is late afternoon or early evening. What you are trying to do is to avoid watering your containers in the middle of the day. If you wait till early evening try not to get water all over the plants leaves. Letting the water sit on the leaves can cause pathogens and disease. So if you have a choice always go with morning or late morning.
Do NOT water at night. You think it's a good time to water your planters so that they can soak up all that moisture but it really causes disease like stated above because there is not evaporation.
So to rap this up, here are a few last tips.
Don't overwater - look for limp or soggy leaves, rotting at the stem or tips browning.
Water consistently over the surface of the soil and not your leaves. When you water, water deeply. The deeper the better for encouraging the potted plants roots to spread throughout the planter.