Black Locust

Choosing Black Locust

Hello, future gardener! The Black Locust is a hardy tree that’s great for beginners because it can handle tough conditions. It grows quickly and provides beautiful white flowers in the spring. You can start with seeds or young saplings from a garden center. If you’re planting more than one, keep in mind they’ll need space to grow since they can reach up to 50-80 feet tall!

Tip: If you're looking for something low-maintenance that still adds charm to your yard, this is a great choice.

Timing

Black Locust trees are pretty tough and can be planted almost any time of year, but early spring or fall is ideal. This gives the roots enough time to settle before extreme weather hits.

Tools and Materials

Black Locust seeds or saplings

A shovel or spade

Garden soil (regular soil works fine)

Mulch (optional, but helpful)

Watering can or hose

• A sunny or partially shaded spot

Tip: You don’t need fancy tools—just the basics will do!

If Using Seeds:

1. Soak the seeds in warm water for 24 hours before planting. This helps them germinate faster.
2. Dig a small hole about 1 inch deep in well-draining soil.
3. Place 2-3 seeds in each hole and cover them lightly with soil.
4. Water gently but thoroughly, keeping the soil moist while the seeds sprout.
5. Once the seedlings are a few inches tall, thin them out so only the strongest plant remains.

If Using Saplings:

1. Dig a hole twice as wide as the root ball and just as deep.
2. Loosen the roots slightly if they’re tightly packed.
3. Place the sapling in the hole, making sure the top of the root ball is level with the ground.
4. Fill in with soil, pressing down gently to remove air pockets.
5. Water thoroughly after planting.

Tip: Plant your Black Locust where it has room to grow, as its roots can spread quite far.

Sunlight Requirements

Black Locust trees love sunlight! They thrive best in full sun but can also tolerate partial shade. Make sure they get at least 6 hours of direct sunlight daily for optimal growth.

Watering Method

• Newly planted trees need regular watering, especially during the first year.
• Water deeply once a week, ensuring the soil stays moist but not soggy.
• After the tree is established, it becomes drought-tolerant and won’t need frequent watering unless there’s a long dry spell.

Tip: A good rule of thumb is to water when the top 2 inches of soil feel dry.

Fertilizing Tips

Black Locust trees don’t require heavy fertilization. However, if you want to give them a little boost, use a balanced, slow-release fertilizer once a year in early spring.

Pruning

Prune your Black Locust in late winter or early spring before new growth begins. Remove any dead or crossing branches to encourage a strong structure and healthy growth.

Tip: Wear gloves when pruning, as the bark and thorns can be a bit tough on the hands.

While Black Locust trees aren’t typically “harvested” like vegetables or fruits, you can enjoy their benefits in other ways:

When to Expect Flowers

• Beautiful white flowers usually appear in late spring to early summer.
• These flowers are fragrant and attract bees, which is great if you’re interested in supporting pollinators.

How to Enjoy the Tree

• The wood is very strong and rot-resistant, often used in furniture or fence posts. If you’re into woodworking, you might find a use for pruned branches.
• Some people even use the flowers to make tea or syrup, though always check if it’s safe to consume parts of the tree in your area.

Tip: Be careful if you have pets or livestock, as certain parts of the Black Locust can be toxic to animals.

1. Yellow Leaves

Cause: Could be due to overwatering or poor drainage.

Solution: Check the soil moisture and adjust your watering schedule. Ensure the planting area has good drainage.

2. Slow Growth

Cause: Lack of sunlight or nutrients.

Solution: Make sure the tree is getting enough sunlight and consider using a slow-release fertilizer in early spring.

3. Branches Breaking

Cause: Strong winds or heavy snow.

Solution: Prune weak or damaged branches regularly to prevent breakage. Consider staking young trees if you live in a windy area.

4. Insects on the Tree

Cause: Aphids or other common pests may occasionally bother your Black Locust.

Solution: Use a gentle insecticidal soap spray or blast them off with water. The tree is generally pest-resistant, so this shouldn’t be a major issue.

5. Roots Spreading Too Far

Cause: Black Locust roots are known for spreading widely.

Solution: Plant the tree away from structures, driveways, or other plants that could be affected by root growth.