How to Grow Hardy Gardenia - Plant Care & Tips

By NorwichGardener Team   /   2024

Hardy gardenia is a shrub that can grow up to 10 feet tall. It has dark green leaves and large, white flowers that bloom in the summer. Hardy gardenia is native to Asia and is a popular plant in many gardens.

How to Grow Hardy Gardenia - Plant Care & Tips

Also known as

  • Gardenia jasminoides
  • Gardenia augusta
  • Gardenia taitensis
  • Gardenia radicans
  • Gardenia brighamii

Things to Know

  • Hardy gardenia is a flowering shrub that is native to China.
  • It is a member of the family Rubiaceae.
  • The plant has glossy, dark green leaves and white flowers that are incredibly fragrant.
  • Hardy gardenia is an evergreen shrub, meaning it will keep its leaves year-round.
  • It prefers to grow in well-drained, sandy soils in full sun to partial shade.
  • Hardy gardenia is relatively low-maintenance and is not known to be susceptible to many pests or diseases.
  • However, it can be susceptible to root rot if overwatered.
  • Hardy gardenia is a popular choice for gardens and landscaping due to its beautiful flowers and foliage.
  • It can be propagated via seed, cuttings, or division.
  • Hardy gardenia makes an excellent addition to any garden or landscape.

How to Grow

  1. For hardy gardenia, first step is to find the perfect location. This plant prefers full sun to partial shade, and well-drained soil.
  2. Gardenias dislike having wet feet, so make sure the planting area does not stay soggy after a rain.
  3. If you need to improve drainage, mix in some organic matter such as compost or peat moss.
  4. Once you have chosen the location, it is time to dig the planting hole. The hole should be twice as wide as the root ball, but only as deep.
  5. Gently remove the plant from its container and loosen any entangled roots.
  6. Place the plant in the hole, fill in with soil, and firm gently.
  7. Water well, using a root stimulator if desired.
  8. Apply a 2-3 inch layer of mulch around the plant, keeping it several inches away from the stem.
  9. Gardenias are heavy feeders, so fertilize regularly according to package directions.
  10. Finally, enjoy your beautiful gardenia!

Related plant:
Hardy Shrubs

Soil Condition

About soil condition, Hardy gardenias prefer humus-rich, acidic soil that is well-drained. The soil should be moist, but not soggy since this can lead to root rot. You can improve the drainage of your soil by mixing in some organic matter, such as compost, peat moss, or bark chips. If your soil is too alkaline, you can lower the pH by adding some sulfur to it.

About light

Just like other gardenias, Hardy Gardenias (Gardenia jasminoides) require full sun to partial shade to produce the best blooms. Flowering will be reduced in shady areas. Hardy Gardenias also require acidic soil with a pH between 5.0 and 6.0.

The Temperature

The temperature condition that is most ideal for the Hardy Gardenia is one that is cool and humid. This plant does not do well in hot and dry conditions. It is important to keep the Hardy Gardenia in an environment that is moist and has good drainage.

Humidity Aspect

Ideal humidity condition for this plant is 50-70%. Hardy gardenia can tolerate short-lived droughts and does not need much supplemental irrigation in moist conditions. However, the plant cannot tolerate waterlogged or constantly wet soils.

Fertilizer Requirement

Regarding fertilizer, this plant does best with something that is slightly acidic. This can be in the form of Miracle Grow's Acid Loving Plant Food or something similar. As for the roots, Hardy Gardenias are not too picky. They can grow in sandy soil as well as in more clay-like soils. Just make sure the soil is well drained.

Light requirement

Pruning your hardy gardenia (Gardenia jasminoides) is important to encourage new growth and keep the plant compact and tidy. Pruning also helps to prevent the plant from becoming leggy and overgrown. Hardy gardenias can be pruned in late winter or early spring, before new growth begins. Use sharp, clean pruning shears to remove any dead or damaged branches. Cut back any leggy or straggly growth to encourage the plant to produce new, more compact growth.

Plant Propagation

Propagation is typically done via stem cuttings taken from Gardenia jasminoides plants in late spring. The cuttings should be 4-6 inches long and have at least two sets of leaves. Cut just below a leaf node, remove the bottom leaves, and dip the cut end in rooting hormone. Plant the cutting in a pot filled with moistened potting mix and place in a warm, humid location out of direct sunlight. Keep the soil moist but not soggy and within a few weeks, roots should form and new growth will appear. Once new growth is evident, you can transplant the Gardenia jasminoides cutting into a larger pot or into the garden.

Growth Speed

Usually, the plant growth rate is between 24 and 36 inches per year. However, some varieties can grow up to 48 inches per year. The amount of growth depends on the variety, the age of the plant, the health of the plant, the time of year, and the amount of water and fertilizer the plant receives.

The Problems

Common problems for this kind of plant plants include: lack of blooms, leaves turning yellow or brown, and stems and branches dying back. Most of these problems are caused by cultural issues, such as too much or too little water, too much or too little fertilizer, or improper pruning.

Growing Tips

  • If you are growing hardy gardenias in containers, make sure to use a well-draining potting mix.
  • Hardy gardenias prefer a sunny location, but will tolerate some light shade.
  • Water your plants regularly, keeping the soil moist but not soggy.
  • Fertilize your plants every few weeks during the growing season with a balanced fertilizer.
  • When the gardenias are in bloom, deadhead the flowers regularly to encourage more blooms.
  • Pinch back the tips of the plants to encourage bushier growth.
  • Protect your plants from strong winds to prevent damage to the fragile flowers.
  • Watch for common pests and diseases, such as aphids, scale, and powdery mildew.
  • dialogue carefully when pruning hardy gardenias, as they bloom on new growth.
  • Overwintering hardy gardenias indoors is

Similar Plants

  • Hardy Gardenia (Glasshouse Works Greenhouses)
  • Hardy Gardenia (Iwagaki Nursery)
  • Hardy Gardenia (Knox Nursery)
  • Hardy Gardenia (Mikisew Nursery)
  • Hardy Gardenia (Oak Hill Gardens)
  • Hardy Gardenia (Pine Knot Farms)
  • Hardy Gardenia (Thomas Hill Nurseries)
  • Hardy Gardenia (Timberline Gardens)
  • Hardy Gardenia (White Flower Farm)
  • Hardy Gardenia (WRight Nursery)

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Gardenia: A Gardener’s Challenge - Purdue University
Hardy ATI | Higher Education Institute

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Reviewed & Published by Richelle
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Shrubs Category