Blackjack Oak

About Blackjack Oak

Blackjack Oak is a super rare houseplant 🌿 that is easy to grow and needs regular watering to thrive. They do best in long-lasting, direct light ☀️ and should be less than 1 foot from a window.

Blackjack Oak likes soil that is well draining. Your plant shouldn't need added fertilizers if you repot each time it doubles in size.

Blackjack Oak belongs to the Quercus genus, and is native to the Central and Eastern United States.

⚠️ Blackjack Oak is extremely dangerous if consumed. If you, a family member, or a pet has ingested any amount of plant material contact Poison Control, US (800) 222-1222, or your veterinarian immediately. These plants are not recommended for homes with children, cats, or dogs.

Taxonomy

Scientific name

Quercus marilandica

Genus

Quercus

Family

Fagaceae

Order

Fagales

How to care for Blackjack Oak

💦 Water

How often to water your Blackjack Oak

Blackjack Oak needs 0.5 cups of water every 9 when it doesn’t get direct sunlight and is potted in a 5" pot.

Use our water calculator to personalize watering recommendations to your environment or download Greg for more advanced recommendations for all of your plants.

Water 0.5 cups every
9

Does your plant get direct sunlight?

No Yes

Select the pot size

☀️ Light

Finding light for Blackjack Oak in your home

Blackjack Oak love being close to bright, sunny windows 😎.

Place it less than 1ft from a south-facing window to maximize the potential for growth.

Blackjack Oak does not tolerate low-light 🚫.

Select your region to see how the current weather in your area affects the placement of Blackjack Oak in your home 🏡.

🪴 Nutrients

How to fertilize Blackjack Oak

Nutrient, fertilizer, and repotting needs for Blackjack Oak: repot after 2X growth

Most potting soils come with ample nutrients which plants use to produce new growth.

By the time your plant has depleted the nutrients in its soil it’s likely grown enough to need a larger pot anyway.

To replenish this plant's nutrients, repot your Blackjack Oak after it doubles in size or once a year—whichever comes first.

Browse #BlackjackOak

💡 FAQs

⭐ Difficulty Level

Blackjack Oak is generally considered an easy-to-care-for plant and makes a great choice for beginners!

How to Grow Blackjack Oak →

Benefits of Growing Blackjack Oak →

Common Blackjack Oak Problems →

Outdoor Care Guide for Blackjack Oak →

💦 Water Needs

Blackjack Oak prefers for the soil to dry out between waterings and should be watered regularly. Use our water calculator to personalize watering recommendations to your environment or download Greg for more advanced recommendations for all of your plants.

Blackjack Oak Water Frequency →

Blackjack Oak Root Rot →

☀️ Sunlight Needs

Blackjack Oak requires abundant, bright and direct light. Place it less than one foot from a window to ensure it receives enough light to survive 💪. Select your region to see how the current weather in your area affects the placement in your home 🏡.

Blackjack Oak Light Requirements →

Blackjack Oak Direct Sunlight Needs & Tolerance →

🐶 🐈 👶 Toxicity

Blackjack Oak is extremely dangerous if consumed. If you, a family member, or a pet has ingested any amount of plant material contact Poison Control, US (800) 222-1222, or your veterinarian immediately. Blackjack Oak is not recommended for homes with children, cats, or dogs.

🪴 Soil

Blackjack Oak does best in well-draining soil. A good soil will contain lots of organic matter such as coco coir as well as perlite or vermiculite to help with drainage. Adding a handful of perlite to regular store-bought potting soil should do the trick!

Best Soil Mix for Blackjack Oak →

Best Pots for Blackjack Oak →

When and How to Successfully Repot Blackjack Oak →

What Are Healthy Blackjack Oak Roots →

💩 Fertilizer

Blackjack Oak grows very slowly and doesn’t require added fertilizer. Replacing your plant’s potting soil once a year should provide them with more than enough nutrition. Remember, plants get their energy from sunlight, not fertilizer!

How Much and When to Fertilize Blackjack Oak →

⬆️ ⬇️ Growth Pattern

Blackjack Oak will branch off as it grows. To encourage branching, pinch off the newest growth at the tip and the stem will branch off into two.

Blackjack Oak Lifecycle →

Blackjack Oak Size Guide →

How and When to Prune Blackjack Oak →

🌦️ Growing Outdoors

USDA Hardiness Zone
Blackjack Oak can be grown outdoors in USDA Hardiness Zones 5a-9a. Find your local hardiness zone here.

Blackjack Oak Temperature Tolerance →

Blackjack Oak Hardiness Zones →

Landscaping Ideas with Blackjack Oak →

When to Plant Blackjack Oak →

How to Plant Blackjack Oak →

Where to Plant Blackjack Oak →

Winter Care for Blackjack Oak →

Best Companion Plants for Blackjack Oak →

Is Blackjack Oak a Weed? →

🌱 Propagation

The seeds of Blackjack Oak can be used to grow new plants! After your plant flowers, any seeds that formed can be collected and germinated in potting soil.

How to Propagate Blackjack Oak →

🍂 Yellow Leaves

Yellow leaves aren’t always a reason to panic, and can be a normal part of a plant’s life cycle. Unless brand new leaves are turning yellow or all the leaves change color at once, it’s likely just your plant shedding old leaves.

Overwatering and root rot are the most likely cause of problems in Blackjack Oak, since they are sensitive to wet soil. The leaves may also appear to be curling or drooping. Less often, yellow leaves are caused by underwatering, nutrient deficiencies, or pests.

Replace soggy soil with fresh, dry soil and download Greg to make sure your plant never gets overwatered again!

🧐 Troubleshooting

When troubleshooting a sad-looking houseplant, start by checking for signs of distress in its leaves, such as yellowing, browning, or drooping, which can indicate overwatering or nutrient deficiencies.

Inspect the soil moisture; too dry or too wet soil can cause problems.

Ensure the plant is getting the right amount of light, as too much or too little can stress it.

Finally, consider environmental factors like temperature and humidity, and adjust care routines accordingly to revive your plant.