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What Are Plug Plants, and How Do I Grow Them?

Plug plants are an easy alternative to sowing seeds and are an economical way to add beautiful colour to your garden.

The main thing to note with these tiny seedlings is that they are not suitable for planting straight into your garden as they are still vulnerable to the weather. So keep your new plug plants in a conservatory, greenhouse, or sunny windowsill to keep them warm and protected.

Begonia Plugs, Marigold Plugs, and Impatiens:

Minimum temperature of 10°C. Grow these plants on a heated tray until the roots have rooted around the container.

Petunia Plugs, Geranium Plugs, and Lobelia Plugs:

Minimum temperature of 6°C, but it is best to keep them at a temperature closer to 20°C.

Antirrhinum Plugs:

Minimum temperature of 1°C, as they are a bit tougher than the other plug plants, but make sure their soil is moist at all times.

When are plug plants ready for the garden?

As your plants get bigger they will, in turn, need watering more frequently. It is also a good idea to feed your plug plants with a balanced liquid fertiliser once a week once roots begin to appear at the edge of the container.

Once the plants have rooted around the container enough, so that the compost won’t fall apart, they are ready for plating into tubs, baskets, or flower beds. Although it is important to wait until the risk of frost has passed – and in the UK, particularly in the countryside, we can see significant frosts until late May!