Skip to Content

15 Perennial Plants That Love Your Coffee Grounds!

Sharing is caring!

Good day, green thumbs! Fancy a cup of joe? Your garden does. Yes, you heard that right. Your cup of morning cheer has a secret life – it’s also a fantastic plant perk-me-up. While you’ve been savoring that delicious dark elixir, your perennials could have been enjoying the leftovers.

It turns out coffee grounds are rich in nitrogen, potassium, and essential minerals that many plants crave. Plus, they can improve soil structure and protect against certain pests.

So, let’s dive into the horticultural happy hour and discover 15 perennials that absolutely love coffee grounds. Let’s get brewing, my fellow plant lovers!

1. Roses:

Call it the tale of Beauty and the Brew! Roses love coffee grounds. The added nitrogen gives them a real boost, especially during blooming season.

Sprinkle the grounds around the base of your roses and watch the magic unfold. Just remember not to go overboard, moderation is the key – too much caffeine isn’t good for anyone, even roses.

2. Hydrangeas:

Hydrangeas are a coffee grounds’ best friend, and the reason is pretty “grounds” for excitement. Coffee can alter the pH level of the soil, leading to beautiful blue blooms. Want a floral blues festival in your backyard? Add some coffee grounds to your hydrangeas’ diet.

3. Azaleas:

Coffee and azaleas? It’s a match brewed in horticultural heaven. These acid-loving plants thrive when coffee grounds are added to the soil, helping them bloom brighter. And remember, the thicker the mulch, the better the brunch for your azaleas.

4. Rhododendrons:

Much like azaleas, rhododendrons are big fans of acid-rich soil. A dash of coffee grounds around the base of these perennials can help boost flowering. Besides, rhododendrons sound like they need a coffee, don’t you think?

5. Lilies:

Lilies may not drink a latte, but they do appreciate a sprinkle of coffee grounds. This generous dose of nitrogen helps them grow strong and healthy. Remember, a little “ground” love goes a long way for these perennials.

6. Camellias:

Camellias thrive in acidic soil, and you know what that means – it’s coffee time! Coffee grounds will help your camellias flourish. Besides, the coffee smell might just make your garden the best-smelling one on the block.

7. Holly:

Holly plants can certainly holler for some caffeine. The acid in coffee grounds helps these plants absorb nutrients more effectively, making them healthier and more resilient. And let’s face it, even holly needs some holly-jolly caffeine now and then.

8. Ferns:

Ferns are another group of perennials that enjoy the perks of used coffee grounds. The coffee helps them maintain a lush and verdant appearance. Fern-tastic, isn’t it?

9. Clematis:

Give your clematis a caffeine kick. These beautiful climbers benefit from the nitrogen boost in coffee grounds, helping them climb new heights. After all, who doesn’t need a little pick-me-up to start the day?

10. Bleeding Heart:

Bleeding hearts can often benefit from a little extra love, and coffee grounds provide just that. The added nitrogen helps these plants bloom more profusely. It’s kind of poetic, really – coffee healing a bleeding heart.

11. Geraniums:

Geraniums are already low-maintenance, and adding coffee grounds to their regimen makes them even easier to care for. They’ll not only bloom better but also be more resistant to pests. Imagine that, coffee as a geranium’s personal bodyguard!

12. Dahlias:

Coffee grounds can be dah-lia-lightful for these lovely perennials. Adding them to the soil helps dahlias grow healthier and more vibrant. And who doesn’t want more vibrant dahlias?

13. Tulips:

Who knew tulips loved coffee just as much as we do? Coffee grounds add essential nutrients to the soil, allowing tulips to grow stronger. As the saying goes, tulips and coffee – a “brew-tiful” combination.

14. Hostas:

Hostas love a good coffee boost. The nutrients from coffee grounds help hostas grow larger and healthier. It’s the host with the most-as, thanks to a little java jolt.

15. Begonias:

The Begonia/Coffee romance is real, folks. Coffee grounds help these shade-loving plants thrive and bloom. And they thought they could hide their coffee crush!

Tips on Using Coffee Grounds for Perennials:

Using coffee grounds in your garden is an excellent way to reuse and recycle, but there are a few things you should know to get the best results:

Moderation is key:

Just as you wouldn’t guzzle down ten cups of coffee in a single morning (well, most of us wouldn’t), your plants shouldn’t overdose on coffee grounds either. Used coffee grounds are slightly acidic and can lower the pH of your soil.

This is beneficial for acid-loving plants like azaleas and rhododendrons, but excessive amounts can make the soil too acidic for many plants, inhibiting their ability to absorb nutrients.

A good rule of thumb is to add no more than half an inch of coffee grounds to your soil at a time, mixing it in well. Allow the soil to assimilate this ‘coffee dose’ before adding more. In this way, you’ll ensure your plants get just the right caffeine buzz without getting a soil hangover.


Adding coffee grounds to your compost is a bit like adding a nutrient-packed green smoothie to your breakfast regimen. Coffee grounds are high in nitrogen, a vital nutrient for compost, and are thus classified as a “green” compost material.

The trick is to balance these with “brown” compost materials, which are high in carbon. These include items like leaves, straw, or newspaper. A good compost pile should have a balance of green and brown materials, ideally in a 1:3 ratio.

So, for every bucket of coffee grounds you add, try to add three buckets of brown matter. This balanced diet will keep your compost pile healthy and productive, ready to provide nutrient-rich compost for your garden.

Pest Control:

Would you believe that your coffee habit could keep pests at bay? Well, it’s true! Coffee grounds can be a great natural deterrent for several garden pests, especially slugs and snails, who are put off by the gritty texture and caffeine.

Simply sprinkle the coffee grounds around the base of the plants you want to protect, creating a protective ‘caffeine fortress’. While it won’t guarantee a completely pest-free garden (if only it were that simple), it’s a great organic method to add to your pest-control toolbox.

Not for All Plants:

It’s important to remember that, much like people, not all plants are coffee lovers. Some plants, such as tomatoes and peppers, prefer alkaline soil and can struggle if you add coffee grounds.

Remember, it’s always best to know your plants’ preferences before introducing something new to their diet. Think of it as a dinner party – you wouldn’t serve a steak to a vegetarian guest, would you? The same principle applies to your garden.

Understanding your plants’ needs, being aware of the effects of coffee grounds, and using them wisely will ensure that your garden remains a happy, thriving space for all its green inhabitants. So let’s raise our coffee cups to a lush, healthy garden!

Now, who knew that your daily coffee ritual could turn into a delightful gardening practice? From roses to begonias, a wide variety of perennials adore coffee grounds.

So next time you brew a cup, remember to save the leftovers for your garden friends. After all, sharing is caring, and in this case, sharing can lead to some spectacularly blooming friendships. Happy gardening, folks!

Sharing is caring!