Flowers that like alkaline soil thrive the best in soil with a pH level higher than 7.0. These plants have adapted well to grow in soil that needs more specific requirements for their growth, as alkaline soil mainly can be found in semi-desert and dry climate areas. Whether you’re on the hunt for some hues to your garden, or want to create spectacular cut flower bouquets and arrangements, these flowering plants are a great choice for anyone who is looking to cultivate flowers in alkaline soil. Let’s check them out!
Table of Contents
Flowering Herbs That Like Alkaline Soil
Nettle-leaved Bellflower (Campanula trachelium)
Zones: 5 to 8
Light: Full shade, partial shade, full sun
Watering: Keep regular watering, about once a week
Resistant to: Deer
Need some flowering herbs for your cottage garden? Then you should try nettle-leaved bellflower. These flowers like alkaline soil, thrive in cooler temperatures of 16 to 18-degree celsius and can self-sow.
Caraway (Carum carvi)
Zones: 3 to 9
Light: Full sun, partial shade
Watering: Keep regular watering, about once a week
Resistant to: Deer
Not only do these white, umbrella-shaped flowers like alkaline soil, but they also provide some health benefits–including treatment to treat pneumonia and indigestion! The tiny, brown, elongated oval-shaped seeds of caraway also have been used to give a savory and sweet flavor to dishes like bread and stews.
Peruvian Zinnia (Zinnia peruviana)
Zones: 3 to 10
Light: Full sun
Watering: Keep regular watering, about twice a week
Resistant to: Drought
The classic Peruvian zinnias flourish in almost every hardiness zone, as long as it has sandy soil with good drainage. They make perfect ornamental flowers that like alkaline soil for small gardening spaces like containers and window boxes.
Flowering House Plants That Like Alkaline Soil
Spider Lilies (Hymenocallis)
Zones: 2 to 11
Light: Full sun, partial shade
Watering: Keep regular watering, about once a week
Resistant to: Drought, deer, salt, rabbit, wet soil
Spider lilies are such striking beauties with their fragrant blooms and long, narrow stamens that are shaped like spider legs. These flowers like alkaline soil, with a pH of 7.6 to 7.8. Using clay or sandy soil with high organic matter like moss and earthworms will help them to thrive well.
Cigar Flower (Cuphea ignea)
Zones: 10 to 12
Light: Full sun, partial shade
Watering: Keep daily watering in young plants, then about once a week once the plant matures
Resistant to: Pests and diseases, somewhat drought
This native to Mexico and Jamaica plant lives up to their name–the cigar flowers produce blooms that resemble tiny, orange-colored cigarettes. These kinds of tropical flowers like alkaline soil, love constant moisture and are somewhat heat tolerant. They are good for hanging baskets and containers too.
Wood Sorrels (Oxalis)
Zones: 5 to 11
Light: Full shade, partial shade, full sun
Watering: Keep regular watering, about once a week
Resistant to: Black walnut, poor soil
Although wood sorrels adapt well to a wide range of soil pH, including alkaline, it’s best to keep the pH between 7.0 to 7.5 (mildly alkaline). Well known for its clover-like foliage and tiny, showy purple, white, or yellow blossoms, this South African and American native miracle plant is safely edible, as it has anti-inflammatory, anti-diabetic, antiseptic, and diuretic properties.
Evergreen Shrubs for Alkaline Soil
Cape Mallow or African Mallow (Anisodontea)
Zones: 8 to 11
Light: Full sun, partial shade
Watering: Keep regular watering, about once a week
Resistant to: Drought, heat
Thirsty for some tropical evergreen shrubs with feminine pink or burgundy blossoms? It’s time to grow cape mallows in your garden! These are very easy-to-grow flowers like alkaline soil with a good drainage system. Keep their soil moist to let them bloom happily in spring and summer.
Lavender (Lavandula)
Zones: 5 to 9
Light: Partial shade, full sun
Watering: Keep regular watering, about once to twice a week when the plant matures
Resistant to: Drought, deer, poor soil
Give this one of the most favorite plants among gardeners a well-draining soil, add some high organic matter, and you’re good to go! Prune this fragrant flowering plant annually to help them thrive and to keep them in shape.
Orange Ball Tree (Buddleja globosa)
Zones: 7 to 10
Light: Full sun
Watering: Keep regular watering, about once a week
Resistant to: Drought, deer
This perennial shrub is such an enchantress with their yellow or golden, pom-pom-shaped blossoms. Ideal for pollinator-themed gardens and areas like patios or terraces, these flowers like alkaline soil, but can also be grown in neutral and acidic soil. Feed them some fertilizers only during the growing season.
Annual Flowers That Like Alkaline Soil
Cosmos (Cosmos)
Zones: 2 to 11
Light: Full sun
Watering: Keep regular watering, about once to twice a week
Resistant to: Poor soil, drought, and somewhat deer resistant
Like their cousins from the Asteraceae Family, cosmos flowers like alkaline soil, but it’s safe to keep the soil mildly alkaline. In addition to making phenomenal cut flowers for your vase, bouquets, or arrangements, pollinators and butterflies are also loved to munch on them.
Ipomoea (Ipomoea)
Zones: 2 to 11
Light: Partial shade, full sun
Watering: Keep regular watering about once a week, decrease the amount of watering during winter
Resistant to: Fungal-related diseases
Ipomoeas are vining annual flowering plants from the Convolvulaceae (Morning glory) Family. To grow these stunning summer-blooming plants, the recipe is easy. These flowers like alkaline soil, but acidic and neutral soil wouldn’t get them mad. Provide them with fertile and well-draining soil, and they will grant you their showy, tubular-shaped blossoms.
Annual Candytuft (Iberis umbellata)
Zones: 3 to 9
Light: Partial shade, full sun
Watering: Keep regular watering about once a week, and increase the water intake about twice a week in the warmer season
Resistant to: Drought, poor soil, somewhat deer and rabbit
Don’t get confused, the name ‘candytuft’ has nothing to do with flavor or candies. The delicate and colorful annual candytufts are mainly grown for their showy blossoms. These flowers like alkaline soil more than acidic, and the ideal pH to make them happy ranges from 6.0 to 8.0. Overall, the annual candytuft is easy to grow and propagate.
Alkaline Soil-Loving Plants In Summary
Overall, house plants like spider lilies or evergreen shrubs like lavender flowers like alkaline soil, and are easy to find as well as to maintain. These flowering plants thrive in soil with a pH of 7.0 or higher, as they enjoy the nutrients and minerals that are found in alkaline soil. So what are you waiting for? It’s time to add more beauty and vibrant color to your landscape by growing these alkaline soil-friendly flowers.
New author in the hood. Loves gardening and flowers are my spirit animals (yes I know they are not animals but I insist). I will be covering most of the flowers’ topics here and occasionally random though as well.
