When you are buying or receiving plants from someone there are a few things that you need to look at before deciding to plant them in your garden.

You will generally get a better quality plant from a garden center and it will be less likely to have disease or other problems that could spread to other plants in your garden.

There is still the possibility that the garden center plant might not be the healthy specimen that you might expect so you should still check it out before parting with your money.

The first thing you need to do is look at the plant and see whether it looks healthy.
This might seem very obvious but we often assume that buying from a garden center will assure us of a healthy plant when in actual fact even garden centers can have problem plants and you don't want to be the new owner of their problems.

Plants are very good at showing any signs of distress so a plant that doesn't look healthy, generally isn't.

Check the conditions of the leaves, stems and roots of the plant where possible.
You should also look at the condition of the soil that it has been growing in, as this will have had an effect on its health.

If you are buying flowering plants it is always best to buy the ones that have yet to flower, as they will withstand the trauma of transport and transplanting better than those that already have flowers.
If there is no alternative but to buy or receive plants that already have flowers then many people suggest that you should remove all the flowers to give the plant a better chance of survival.
While you might be reluctant to do so, you will probably have a better plant that will produce more flowers in the future.

If there is anything on the plant that concerns you seek advice or decide against having that plant in your garden