Plant Care Dense-Spike Blackroot

Dense-Spike Blackroot

Also known as

Fox-tail or coastal blackroot


Pterocaulon pycnostachyum

How to care for Dense-Spike Blackroot

💦 Water

How often to water your Dense-Spike Blackroot

Water needs for Dense-Spike Blackroot
0.5 cups
every 9

Dense-Spike Blackroot 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

Does your plant get direct sunlight?

Select the pot size

☀️ Light

Finding light for Dense-Spike Blackroot in your home

Light needs and placement for plant Dense-Spike Blackroot: 3ft from a window
3ft or less from
a window

Dense-Spike Blackroot may have difficulty thriving, and will drop leaves 🍃, without ample sunlight.

Place it less than 3 feet from a south-facing window to maximize the potential for growth.

Select your region to see how the current weather in your area affects the placement of Dense-Spike Blackroot in your home 🏡.

🪴 Nutrients

How to fertilize Dense-Spike Blackroot

Nutrient, fertilizer, and repotting needs for Dense-Spike Blackroot: 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 Dense-Spike Blackroot after it doubles in size or once a year—whichever comes first.

Care Summary for Dense-Spike Blackroot

Dense-Spike Blackroot

Greg recommends:


0.5 cups every 9 days


< 3ft from a window


Repot after 2x growth

Based on the 4” pot your plant is in, and that it doesn’t get direct sunlight.

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