How to Keep Your Geraniums Blooming All Winter
There’s something timeless about a greenhouse, filled with terracotta pots and flourishing colorful geraniums. This inspiration led me to discover that geraniums are my favorite flower to grow during the winter months. And it wouldn’t be possible without my greenhouse.
Growing geraniums from seed can be rewarding, especially knowing that once you have established plants, you can propagate them by taking cuttings if there are no propagation restrictions on your seed packets. Geraniums, as it turns out, absolutely love the greenhouse environment, where they can thrive throughout winter if given the proper care.
In my early days of greenhouse growing, I discovered that geraniums are slow growers when starting from seed. While it’s a satisfying process, cuttings are a much quicker way to achieve a flourishing garden. I now implement both seeds and cuttings as I still find joy in growing a tray of seedlings each winter—it adds an extra layer of anticipation.
Prepping for Winter Blooms
Traditionally, gardeners move geraniums into the greenhouse to overwinter, allowing the plants to go dormant. This protects them from winter's harsh elements and ensures they’ll return strong in the spring. Initially, I followed this method, tucking my geraniums inside the greenhouse at the end of summer to take cuttings to start new spring plants.
However, I began wondering: what if I could keep them blooming through winter? What if my greenhouse could stay filled with vibrant color during the coldest months?
How to Grow Geraniums Successfully
To grow geraniums that bloom through winter, prioritize light. Geraniums need ample sunlight, ideally six hours or more each day. Position them in the brightest part of your greenhouse and make sure your shade cloth is removed.
Temperature plays a crucial role as well. Aim to maintain the greenhouse between 45-65°F (10-18°C). While geraniums are resilient, they won’t bloom if the temperature drops too low. Keep it warm enough at night to prevent the plants from slipping into dormancy.
When it comes to watering, less is more. Overwatering in winter can lead to soggy roots and root rot. Water only when the top inch of soil feels dry and ensure proper drainage. Geraniums are forgiving, but they don’t tolerate overly wet conditions in cooler weather.
To stimulate blooms, a diluted, balanced fertilizer every 4-6 weeks is all they need. Over-fertilizing can lead to spindly growth, so it’s important to provide nutrients in moderation.
Regular pruning is key for compact, bushy growth and abundant blooms. Pinch back the tips to encourage branching, and don’t hesitate to remove any leggy growth. Good air circulation is also vital to prevent mildew or mold, especially in a humid greenhouse. Always make sure you have a fan in your winter greenhouse to promote healthy, happy plants.
Enjoying Winter Blooms
Once I shifted my approach from simply overwintering my geraniums to encouraging winter blooms, the results were spectacular. As they acclimated to the greenhouse’s-controlled environment, my plants began thriving, producing the biggest and most vibrant blooms I’d ever seen.
Now, each winter, I’m greeted by a greenhouse bursting with color. The experience of walking into a warm space filled with flourishing geraniums while the world outside is snowy, frosty, and bare is nothing short of magical.
If you're planning to grow geraniums this winter, don’t settle for dormancy. With a little extra care, you can enjoy their vibrant blooms all season long.
Don't Forget...
to bring the beauty of your winter geranium blooms inside your home by using them as cut flowers! Geraniums make lovely, long-lasting arrangements that can brighten up any room during the colder months.Simply follow these easy steps: cut the blooms early in the morning using sharp, clean scissors or pruners. Remove any leaves that would sit below the water line in your vase to prevent decay and place the cut flowers in a clean vase filled with fresh water. Change the water every few days, and your vibrant winter blooms will last indoors, allowing you to enjoy their color and fragrance throughout your home.
