How To Plant a Spring Container Using The Thriller, Spiller, Filler Method
How To Plant a Spring Container Using The Thriller, Filler, Spiller Method
Spring is one of the best times to plant up a container. Whether you’ve got a big patio, a small balcony, or just a doorstep that needs brightening up, a well-planted pot can completely transform your outdoor space – and it’s much easier than you might think.
The secret? A simple technique that professional gardeners use called “thriller, filler, spiller.” Once you know it, you’ll never look at a container the same way again.
What is Thriller, Filler, Spiller?
It’s a way of choosing and arranging plants so your container has height, colour, and texture – without having to think too hard about design. Here’s how it works:
Thriller – This is your centrepiece. A tall, eye-catching plant that creates a focal point and gives the container some height. It goes in the centre of the pot for a 360-degree view, or the back if your container will sit against the wall. For spring containers, ferns work beautifully – they add structure and a lovely fresh green that lasts well into the season. Other good spring thrillers include ornamental grasses, heuchera, or a small evergreen shrub like skimmia.
Filler – These are your colourful, bushy plants that fill out the middle of the container and hide the compost. They should complement your thriller without competing with it. Primroses are a brilliant spring choice – they’re affordable, come in loads of colours, and flower for weeks. Violas, pansies, and alpines all work well here too. A good tip is to plant your fillers in odd numbers – groups of three or five tend to look more natural and balanced than even numbers.
Spiller – Trailing plants that cascade over the edge of the pot, softening the rim and giving the whole thing a lush, established feel. Ivy is the classic choice and works in almost any combination. Variegated ivy adds a bit of extra interest with its white or cream-edged leaves. Trailing heuchera or creeping Jenny are also worth considering if you want something a bit different.
What You'll Need:
You don’t need much to get started. Here’s your checklist:
A container – any size works but make sure it has drainage holes in the bottom. Bigger pots dry out less quickly and give your plants more room, so go as big as you can manage.
Gravel – a small layer of gravel or stones in the bottom of the pot to stop the drainage holes getting blocked.
Multipurpose compost – fill your container about two-thirds full before you start planting. Leave enough space so the tops of your plant root balls sit about 5cm below the rim of the pot.
Your plants – one thriller, two or three fillers, and one or two spillers is a good starting point for a medium-sized pot.
Putting It All Together
Start by adding your drainage layer, then fill with compost to about two-thirds. Place your thriller in the centre first – this is your anchor, so get it positioned before anything else.
Next, arrange your fillers around the thriller. Don’t be shy about packing them in – containers look best when they’re full and lush. Leave a little space at the edges for your spillers.
Finally, tuck your spillers in around the rim so they can trail over the sides. Once everything’s in place, fill any gaps with more compost, firm it all down gently, and give the whole thing a good soak with water.
Looking After Your Spring Container
Spring containers are fairly low maintenance, but they do need regular watering – check the compost every couple of days, especially once the weather starts warming up. Even after rain, it’s worth checking that the water has actually reached the compost and not just bounced off the leaves.
After about six weeks, a fortnightly liquid feed will keep everything looking its best through the season. And if anything starts to look leggy or tired, don’t be afraid to give it a trim – most spring plants will bounce back quickly.
Give It a Go
The beauty of container planting is that there’s no wrong answer. Pick colours you love, experiment with different combinations, and don’t worry about getting it perfect first time – that’s half the fun.
Pop into Raglan Garden Centre and have a browse through our plant department. We’ve got everything you need to build your own spring container, and our team is always happy to help you choose the right plants for your space.
A Few Extra Tips
Think about where your container will sit – if it’s going to be seen from all sides, place your thriller in the centre. If it’s against a wall or in a corner, move it to the back so everything flows forward. Make sure the plants you choose have similar sunlight and watering needs so they’re all happy in the same pot – most spring bedding plants are fairly easy-going, but it’s always worth checking the label. And once things are flowering, get into the habit of deadheading spent blooms every few days. It only takes a minute, and it encourages the plant to keep producing fresh flowers for much longer.