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Astrophytum myriostigma

Name: Astrophytum myriostigma
Brand: Rare Plant Catalog
SKU: 10416735158552
Price: 14.0 USD
Availability: InStock

$14

Astrophytum myriostigma, commonly known as the “bishop’s cap,” is a well-known cactus that is quick to enamor newcomers with its distinctive look. The broad ribs form a neatly divided, spineless body covered in fine white flecks, giving the whole plant a soft, powdery appearance. These markings are made up of trichomes that reflect sunlight, a useful feature in the bright limestone highlands of San Luis Potosí, Coahuila, and Nuevo León, Mexico. During the summer growing season, silky yellow flowers emerge from the crown, a surprisingly delicate feature on gnarled plants adapted to look like weathered rocks.
In cultivation, give this species a highly porous mix with some limestone and water deeply during warm summer weather, allowing the pot to dry between waterings. A slightly snug pot helps the mix dry promptly and is generally preferable to giving the roots more room than they need. Start plants in bright, filtered light and gradually introduce stronger sun, which encourages the dense white covering this species is known for. Keep dry from mid-autumn through winter, particularly once daytime temperatures fall to around 55°F.

pot size: 3.25"

genus: Astrophytum
family: Cactaceae

care & cultivation:

growing season: summer

what growing season means

Active growth occurs in warmer months.
water level: semi-dry

what water level means

Let the soil dry, then water promptly. Avoid prolonged dry spells.
light level: full sun

what light level means

Outdoors in full, unfiltered sun for most of the day. Indoors requires strong horticultural lighting; south windows alone won’t provide this level.
min/max temp: 32°F/110°F

what min/max temp means

32°F — May tolerate short freezes, but protection is recommended for young plants or wet conditions.
110°F — Extreme heat, typical of desert conditions during summer peaks. Many species tolerate or thrive in this range, but shading, misting, and evaporative cooling are often necessary to prevent damage.
humidity level: low

what humidity level means

Adapted to dry air, usually 40% or below. Performs best when the ambient environment is kept dry and may suffer in persistently humid conditions.
dormancy water: intermittent

what dormancy water means

Minimal water during dormancy. Incidental small amounts only to prevent desiccation.
potting mix: very fast-draining

what potting mix means

Loose, stony soils with coarse particles and almost no fines. Comparable to dry landscapes where rain drains away immediately.

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our nursery grew out of a shared belief that rare plants shouldn't stay rare forever. that's why we propagate the plants we'd be excited to receive and offer them directly, without the usual markup

common questions

how do you ship plants?

Very carefully. Each plant is individually packed by hand using materials suited to its size, shape, and needs, usually by the same person who grew it. Heat packs are available during colder months but are not reliable below 15 degrees. If needed, we can hold an order for up to two weeks. All shipments include a California Nursery Stock Certificate for Interstate and Intrastate Shipments.

when does my order arrive?

We ship on Mondays to avoid weekend delays. Most orders go out within a few days, but weather may delay things slightly. USPS Ground Advantage is standard, with Priority available at checkout. You’ll get tracking once your order ships. We don’t have control over carrier speed or when your package is scanned in, but if something seems off or it’s stuck in transit, let us know and we’ll do our best to help.

will I receive the plant pictured?

If the listing description includes "you will recieve the plant pictured", then yes, that’s the one you’ll get. For general listings, you’ll receive a plant of similar size and quality to what’s shown. We grow or hand-select everything ourselves, so what you see is a fair representation of what we send out.

will my plant arrive potted?

Most plants ship bare-root, but we occasionally send them potted when it’s better for the plant. When we ship with soil, we use clean, inorganic media to meet USDA and state requirements for plant shipments.

what if my plant arrives damaged?

Contact us within 3 days of receiving your plant. Send a few clear photos and a short note. The same people who packed your plant have sent out thousands before, but plants are living things and we’ll work with you if something goes wrong.

where can I find care info?

Each product page includes species-specific care notes in an interactive table. Tap the ⓘ icon on any category to reveal detailed guidance. Still unsure? Just ask! Chances are we’ve personally dealt with whatever you’re facing.

do you grow everything yourselves?

Most of it, yes. The vast majority of our plants are propagated by us at our NorCal facility. The rest come from growers we know and trust. We don’t sell wild-collected material, and we never buy from bulk suppliers pushing unlabeled stock grown under questionable conditions. Because we grow most things ourselves and stay small by design, we’re able to keep prices comparable to overseas sellers without cutting corners or sending out half-rooted plants that were never meant to last.

do you offer wholesale?

Yes, our separate wholesale site is currently under construction, but you can reach out on our contact form. Not all plants are available and there are minimum order quantities. Access is limited to those engaged in a commercial trade. If you’d like to open an account, please get in touch with us. And if you think your local nursery should carry our plants, feel free to point them our way.