Discover Arbor Garden Centre and Nursery's Beautiful Plants

Granny Smith apple trees are a globally recognized variety valued for their striking green fruit, exceptional tartness, and outstanding versatility in the kitchen. Originating in the late 19th century in Australia, the variety was first cultivated by Maria Ann Smith near Ryde, New South Wales and quickly gained popularity for its unique flavor and excellent storage qualities. Believed to have arisen as a chance seedling, possibly from a hybrid involving a crab apple and a cultivated apple, Granny Smith’s genetics contribute to its firm texture, high acidity, and remarkable shelf life. Today, it is one of the world’s most important cooking and fresh-eating apples, prized for its ability to hold shape when baked and deliver a refreshing, tangy bite. The Granny Smith apple tree is moderately vigorous, highly productive, and especially well-suited to warmer climates, offering consistent yields of bright green fruit that develop their full flavor as they mature. 

Pollination: Apple trees are not self-fertile. Plant two or more apple trees of different compatible varieties within 15–30 m (50–100 ft) to ensure proper pollination and fruit set. Granny Smith benefits from cross-pollination with mid- to late-blooming varieties such as Fuji, Gala, Pink Lady, and Honeycrisp.

Flowers Blossom: Mid to late spring

Fruit Ripens: Late October to November (depending on climate)

Fruit: Medium to large, bright green apples with a firm, crisp texture. Flesh is pale greenish-white, very juicy, and sharply tart when fresh, mellowing slightly in storage.

Usage: Excellent for baking, cooking, sauces, and fresh eating. Granny Smith apples hold their shape exceptionally well when cooked and are widely used in pies and desserts.

Tree Characteristics: Moderately vigorous, highly productive, and reliable, producing consistent crops of high-quality fruit. Performs best in regions with warm days and cool nights.

Hardiness Zones: 5–9

Light Requirements: Full sun

Soil Requirements: Well-drained loamy soil with a pH of 6.0–7.0

Average Height: 3.6–5.4 m (12–18 ft), depending on rootstock

Maximum Height: Up to 6 m (20 ft)

Spread: 3–4.5 m (10–15 ft), depending on pruning and rootstock

Growth Habit: Upright to spreading with a well-structured canopy

Growth Rate: Moderate

Ontario Native Status: Introduced (originated in Australia)

Best Ontario native plants to grow around apple trees:

• Ground Cover (Shade Tolerant):
  • Wild Strawberry (Fragaria virginiana): Excellent ground cover that acts as a living mulch, attracts bees, and produces small edible fruits.
  • Blue Violet (Viola sororia): A low-growing, shade-tolerant plant that thrives under the canopy.
  • Canada Anemone (Anemone canadensis): A native ground cover that handles shade and helps suppress weeds.
• Pest Repellents & Attractors (Beneficial Insects):
  • Nodding Onion (Allium cernuum): A native allium that repels pests (like aphids) and attracts beneficial insects with its strong scent.
  • Black-eyed Susan (Rudbeckia hirta): Attracts beneficial insects that feed on pests.
  • Joe Pye Weed (Eutrochium spp.): Excellent for attracting pollinators and beneficial predatory wasps.
  • New York Ironweed (Vernonia noveboracensis): High-value pollinator plant.
• Soil Improvers & Habitat:
  • Wild Geranium (Geranium maculatum): Good for shade and beneficial insects.
  • Lupines (Lupinus perennis): Fixes nitrogen in the soil to feed the apple tree. 
  • Other Tips for Apple Tree Guilds:
• Spring Bulbs: Plant daffodils around the drip line to deter deer, rabbits, and voles.
• Chop-and-Drop: Use native plants like comfrey (non-native, but excellent) or goldenrod (native) to cut and lay down as mulch to build topsoil.
• Spacing: Place plants near the drip line (outer edge of branches) to minimize competition with the tree's roots, especially for young trees.