Concrete planters.

[ChetChet]

Hello.
I have a few concrete plant pots in my new front garden. I intend to empty them, jet wash down and pot plants up in them.
I've Googled for info but I can't find advice - just results of planters on concrete.
Can anyone tell me what is best in pots of this type? I don't even know if there are drainage holes. Annuals or perennials? These pots are medium sized, circular and fairly squat but flare out at the top, narrow at the bottom.
Heather maybe?
TIA.

Anyone?

I wouldn’t grow anything in pots without holes. The plants will just drown. You need to drill some holes.

Depends on so much really-position, whether they have drainage holes, size...
I have some concrete planters (with drainage holes) up against a wall. In the early spring they are full of hyacinths and in the summer they have sweet peas or morning glory. I’m a bit lazy and keep the hyacinth bulbs in them all year round-I just change the top of the compost every year and add some miracle grow pellets ever six months or so.

Concrete pots are alkaline in nature, so they will be no good for plants that like acid soil, such as the heathers you mention.

Fill them with water to check if there are drainage holes. If not fill the bottom with gravel and then put plants in plastic pots. Eunymous are very tolerant plants for concrete.

Thank you for replying. I'd quite forgotten about my query until now.
There is a single drainage hole. Very helpful to inform me of alkaline presence. No where on Google mentioned THAT.

None of my houseplant pots have drainage and all my indoor plants are fine but I wouldn’t risk a hole free pot outside as you can’t control the amount of rain.

I did buy a number of cheap plastic pots for the garden last year, without holes, DH ended up having to drill them all as they all got saturated with the heavy rain.

With concrete specifically, I have two concrete pots inside, I find that plants inside tend to dry out quite quickly as the concrete doesn’t seem to retain water, much like terracotta.