blue myrtle cactus vs san pedro Buy Fat Blue Myrtle Cactus Phoenix, AZ | M. geometrizans
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blue myrtle cactus vs san pedro

blue myrtle cactus vs san pedro Buy Fat Blue Myrtle Cactus Phoenix, AZ | M. geometrizans

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blue myrtle cactus vs san pedro Buy Fat Blue Myrtle Cactus Phoenix, AZ | M. geometrizansThe Thickest Blue Columnar Cactus for Phoenix Desert Landscapes Fat Blue Myrtle Cactus (Myrtillocactus geometrizans fat form) is a bold, sculptural columnar cactus prized for its unusually thick blue green stems and striking vertical growth. Unlike the standard Blue Myrtle, this fat form develops wider, more robust columns that create a powerful architectural presence in any landscape. The powdery blue skin gives it an almost metallic shimmer in the

The Thickest Blue Columnar Cactus for Phoenix Desert Landscapes

Fat Blue Myrtle Cactus (Myrtillocactus geometrizans fat form) is a bold, sculptural columnar cactus prized for its unusually thick blue-green stems and striking vertical growth. Unlike the standard Blue Myrtle, this fat form develops wider, more robust columns that create a powerful architectural presence in any landscape. The powdery blue skin gives it an almost metallic shimmer in the Phoenix sun, and its slow-growing, low-maintenance nature makes it ideal for modern desert designs. Whether you're creating a dramatic focal point in a Scottsdale courtyard, flanking a Chandler entryway with living columns, or building a collector's cactus garden in Mesa — Fat Blue Myrtle Cactus delivers serious visual impact with zero fuss.

Fat Blue Myrtle Cactus Plant Details

Attribute Detail
Scientific Name Myrtillocactus geometrizans (fat form)
Common Names Fat Blue Myrtle Cactus, Fat Blue Candle, Garambullo
Mature Height 6–12 feet
Mature Width 4–8 feet (multi-branching candelabra form)
Growth Rate Moderate — 6–12 inches per year in Phoenix once established
Sun Full sun (6+ hrs). Handles reflected heat from walls.
Water Low once established. Highly drought-tolerant.
USDA Zones 9–11 (Phoenix is Zone 9b–10a)
Soil Well-draining. Adapts to Arizona caliche soils with amendment.
Foliage Evergreen — powdery blue-green columns year-round
Special Feature Extra-thick stems with blue powdery coating — the fattest form available

Fat Blue Myrtle Cactus Uses in Phoenix Landscapes

Architectural Focal Point

Fat Blue Myrtle's thick blue columns make it a natural sculptural centerpiece for modern desert courtyards, entry gardens, and xeriscape beds. A single specimen surrounded by decomposed granite and accent boulders commands attention without competing plants. The blue skin creates stunning contrast against warm-toned stucco walls, Cor-Ten steel, and terracotta. For maximum impact, uplight at night to cast dramatic column shadows.

Statement Entryway Planting

Plant a matching pair of Fat Blue Myrtles on either side of a front door, driveway, or gate for a bold, symmetrical welcome. Their vertical form draws the eye upward while the blue color reads as sophisticated and intentional. Choose 15–25 gallon specimens for instant height and presence.

Desert Garden Background Column

Use Fat Blue Myrtle as a tall backdrop behind lower agaves, barrel cacti, and desert shrubs. Its vertical growth adds height without significant spread, making it ideal for layered desert plantings. Pair with Golden Barrel Cactus, Desert Spoon, and Agave americana for a classic Arizona desert composition. Space 4–6 feet from neighboring plants.

Best Time to Plant Fat Blue Myrtle Cactus in Phoenix

Late spring through early fall (April–October) is ideal for columnar cacti. Warm soil and air temperatures promote root establishment and reduce the risk of rot from cold-wet conditions. Avoid planting in winter when cold temperatures and dormancy slow root growth. For container-to-ground transplants, May through September is the sweet spot.

How to Plant Fat Blue Myrtle Cactus

  1. Dig wide, not deep — Excavate a hole 2–3x the width of the root ball, same depth. Never plant deeper than the original soil line.
  2. Check for caliche — Break through any hardpan layer. Columnar cacti absolutely require excellent drainage.
  3. Backfill with native soil — Mix in 30% pumice or perlite for improved drainage. No compost needed.
  4. Spacing — 4–6 feet apart for grouped plantings; 6+ feet for standalone specimens.
  5. Do not water immediately — Let the roots callous for 3–5 days after transplanting before the first watering.
  6. Mulch with gravel — 2–3 inches of rock mulch around the base. Avoid bark mulch that retains moisture against the trunk.

Watering Fat Blue Myrtle Cactus in Phoenix

First Year Watering Schedule

After initial callous period (3–5 days): Water deeply every 10–14 days.
Months 1–3: Every 10–14 days during warm months; monthly in winter.
After Year 1: Every 2–3 weeks in summer; once monthly or less in winter.
Established plants (3+ years): Survive on rainfall alone in most years.

Drip Irrigation

Place 1–2 GPH emitters 18–24 inches from the trunk base. Columnar cacti are highly sensitive to overwatering — always err on the dry side. Root rot is the #1 killer. If unsure, wait another week before watering.

How big does Fat Blue Myrtle Cactus get?
In Phoenix, Fat Blue Myrtle typically reaches 6–12 feet tall with a multi-branching candelabra form 4–8 feet wide. Growth rate is moderate at 6–12 inches per year once established. Larger specimens with multiple branches can take 10–15 years to develop their full form.

What's the difference between Fat Blue Myrtle and regular Blue Myrtle?
Same species (Myrtillocactus geometrizans), but the fat form develops noticeably thicker, wider columns. Standard Blue Myrtle has thinner, more pencil-like branches. The fat form creates a bolder, more substantial presence in the landscape.

Is Fat Blue Myrtle Cactus cold hardy in Phoenix?
It handles typical Phoenix winters well but can suffer damage below 25°F. In unusually cold winters, protect young plants with frost cloth. Mature specimens are more cold-tolerant. Plant in a warm microclimate (south or west-facing wall) for extra protection.

Does Fat Blue Myrtle Cactus produce fruit?
Yes — Myrtillocactus produces small edible purple berries called garambullo, popular in Mexican cuisine. You may see small greenish-white flowers along the ribs in spring, followed by fruit clusters. The berries attract birds and add seasonal interest.

You May Also Like

Blue Myrtle Cactus — The standard form with thinner columns and a more open branching habit.
Crested Blue Myrtle — A rare crested mutation with dramatic fan-shaped growth, perfect for collectors.
Totem Pole Major — A smooth, spineless columnar cactus with a bold sculptural presence.
San Pedro Cactus — A fast-growing columnar cactus with ribbed green columns, great for quick height.

How Many Fat Blue Myrtle Cactus Do I Need?

This is a thick, multi-branching columnar cactus that matures 4 to 8 feet wide, so it is planted as a specimen or a spaced row of living pillars rather than a tight hedge. Use the grouping guide below, measuring center to center.

Planting use Spacing (on center) Layout
Single focal column n/a One specimen in granite with accent boulders
Entry pair 4 to 6 ft apart Two matched plants flanking a door or gate
Sculptural cluster 5 to 6 ft apart Odd-numbered group of 3 or 5 so each column stands clear
Spaced backdrop row 6 ft apart 5 plants span roughly 24 to 30 ft of bed

Fat Blue Myrtle Cactus Season-by-Season in Phoenix

  • Spring (Feb to Apr): Small greenish-white flowers open along the ribs as days warm, the start of the garambullo fruit cycle. A good second window to plant once nights stay above the mid 40s.
  • Summer (May to Sep): Peak growth season. The thick blue columns shrug off Phoenix heat and reflected warmth from south and west walls. Monsoon humidity and rain push a flush of new branching, but keep the root zone on the dry side since rot is the main risk in wet heat.
  • Fall (Oct to Nov): Prime planting season with warm soil and easing heat. Berries finish coloring and draw birds. Roots establish quickly before winter.
  • Winter (Dec to Jan): Holds its blue evergreen structure but is the tender season. Expect cosmetic damage below about 25°F. Cover young plants with frost cloth on hard-freeze nights and site them against a warm wall for protection.

At a Glance

✔ Heat-Loving (Reflected-Heat Tolerant)   ✔ Drought-Tolerant   ✔ Evergreen   ✔ Low-Maintenance   ✔ Pollinator-Friendly   ✔ Edible   ✔ Deer & Rabbit-Resistant   ✔ Cold-Hardy to 25°F

Plant It With

  • Blue Myrtle Cactus: the standard thinner-columned form, a natural companion for a graduated blue grouping.
  • Crested Blue Myrtle: the fan-shaped crested mutation of the same species, a collector's accent at the base.
  • Mexican Fence Post: a slim green columnar cactus that contrasts the fat blue columns for added vertical rhythm.
  • Golden Barrel: a low golden globe that grounds the tall blue columns at ground level.

Is Fat Blue Myrtle Cactus Right for Your Yard?

It thrives in full sun with sharp drainage, including hot reflected-heat spots against stucco or block walls, and asks for very little water once established. Give it room for the 4 to 8 foot branching spread and a warm microclimate so winter cold stays survivable. It is not a fit if your soil stays soggy or your planting spot drops well below 25°F without protection, since prolonged cold-wet conditions cause rot and frost scarring.

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Amanda Greathouse
Boise, US
★★★★★ 3
3.5 stars, A little boring to say the least.
Format: Kindle
Wow so I'm not sure where to begin on this one. This was a very different take on the legend of Arthur and Excalibur. This is told from the point of view of Morgan the sister of Arthur. Honestly the first 50% of this book is world building and character building which unfortunately was super boring for me. Morgan to me was a female MC that had a hard time in believing in herself. Sometimes taking too long to understand exactly what was going on around her. Draven was also a different male MC, like I couldn't put my finger on him and what he was all about. It was not until the last 10% of the book did we get some answers on the mystery that is Draven. The other 50% of the book centered around this big journey with everyone having a different motive. We see a spark of magic around this time that had me excited but then we never expanded upon that and what it could mean for the female MC. I feel like I want to read the second book just to see where this goes, but the spice was probably a 2 out of 5. Side characters are ok, Lancelet was fun but I almost felt like I wanted more.
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Reviewed in the United States on September 13, 2023
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Krystina
Battle Creek, US
★★★★★ 5
A bewitching retelling of Arthurian legend!
Format: Kindle
In a land where the Fae have nearly become only a legend and those who still posses even a morsel of the blood are few and far between, Morgan finds herself cast aside by most of society due to her rumored half-Fae lineage, including her brother, King Arthur. With the kingdom at the brink of war, Arthur entrusts her with a quest to retrieve a Fae weapon of legendary power: the sword of Perun, Excalibur. Accompanied by men she loathes, Captain Kairos Draven and Ragnar Whitehorn, she embarks on her long and unbeknownst perilous journey, only to find that things she once believed to be myth are in fact very real. With devastating twists, omitted truths, witty banter and fierce action, Queen of Roses leaves you begging to know more about the secrets of Aercanum! Wow, wow, wow! Going into this story, I did not realize that it was going to be a retelling of Arthurian legend, especially not one with a fantastical twist! The unique spin almost gave me The Witcher vibes and I think adding Fae into the mix was quite interesting. I knew the basics of the legend but after reading this book, it has piqued my interest and makes me want to learn more about it. My attention was snatched as soon as I finished the prologue and I knew that I was going to devour this story. I truly enjoyed the gender swaps and even how Arthur was portrayed as villainous. Morgan’s past and even her parts of her present is absolutely heartbreaking, and I felt for her at times. I can only recall one other book that made me hate characters the way I despised Florian and Arthur, leaving me with my blood boiling and feeling disgusted. Even after finishing the book, Draven is still a mystery to me and I cannot figure out how to feel about him. I guess they just means that the author did an excellent job at conveying each character’s persona! The rich world building and imagery made it easy for me to visualize the places that the group visited along their journey. I am truly engulfed in this story and I cannot wait to see wait fate awaits Morgan and how the Fae will be even more incorporated in the next book!. I received a free copy of this book and am voluntarily leaving a review.
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Reviewed in the United States on August 11, 2023
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Tiana
Louisville, US
★★★★★ 4
Enchanting
Format: Kindle
"Queen of Roses" by Briar Boleyn is a delightful and refreshing reimagining of the classic tale of King Arthur, with a captivating twist that places the spotlight on Morgan, a character who has often been overshadowed in traditional retellings. Boleyn's creative decision to shift the narrative perspective to Morgan breathes new life into the story, offering readers an intriguing and compelling look at the Arthurian world from an entirely different angle. One of the most commendable aspects of this book is its incorporation of Fae elements, which adds an enchanting layer of magic and mystery to the already familiar Arthurian setting. Boleyn skillfully weaves the world of the Fae into the narrative, creating a captivating backdrop against which the events of the story unfold. This addition not only adds depth to the world-building but also provides ample opportunities for twists and turns that keep readers thoroughly engrossed. However, while the book boasts numerous strengths, it does have one noticeable flaw: the characterization of Morgan. While it is reasonable to create a flawed and complex protagonist, it appears that at times, Morgan's character becomes overly difficult and hard to relate to. Her persistently negative perception of one of the main male characters, who is a potential love interest, despite his efforts to support and assist her, may come across as somewhat irrational and could test the patience of some readers. Striking a balance between a strong, independent character and one who can recognize genuine support and affection could have enhanced the overall reader experience. Nonetheless, the allure of "Queen of Roses" lies in its innovative approach to the Arthurian legend and its skillful blending of fantasy elements into a familiar narrative. Boleyn's evocative prose draws readers into a world where magic, destiny, and fate entwine, leaving us eager to uncover the mysteries that unfold within the pages. I received a free copy of this book via Booksprout and am voluntarily leaving a review.
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Reviewed in the United States on July 28, 2023
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Stephanie
Cuba, US
★★★★★ 5
An action-packed dark romantasy
Format: Kindle
I loved this book! Queen of Roses is an Arthurian-inspired dark romantasy that is the first book in the Blood of Fae series. The story follows Morgan, the princess of Camelot who is rumored to be part fae. Fueled by prejudiced hatred and a mistrust of fae blood, Morgan’s abusive father strips her of her birthright and hands it to her half-brother, Arthur. Instead of becoming queen, Morgan is commanded to join the temple of the goddesses when she comes of age. However, Arthur turns into a psychopathic, power-hungry, fae-hating king as he ages. He develops malevolent plans and commands Morgan to find an ancient weapon with legendary power. Although Morgan is wary of Arthur’s intentions, she embraces the opportunity to go on a journey and potentially change her fate. The story picks up from there and we follow Morgan on her quest to find the ancient relic. It’s full of high stakes adventure, mystery, tension, banter, forced proximity, hidden magic, self discovery, and betrayal. This first installment of the series intricately develops the world building and character development. There’s little romance in this book, but it is evident that it is a slow burn that will continue to develop throughout the remainder of the series. Overall, I loved the world building, the epic fantasy, Morgan’s journey of self discovery, and all of the twists and turns that set the stage for the future installments. I can’t wait to see what happens next!
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Reviewed in the United States on April 7, 2024
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AlynReads
Omaha, US
★★★★★ 4
Arthurian Fae Quest…say less.
Format: Kindle
A fae centered Arthurian tale unlike any I’ve read so far. The author did a great job at descriptive world building, with scenes easily playing out in my minds eye. There was plenty of action, suspense, and even a touch of horror. An enemies to lovers, slow burn romance, a quest, with plot twist and turns aplenty. There was a love triangle, which I’m not usually a fan of but, it played out well in this story line. The FMC, Morgan Pendragon, was so blatantly naïve, yet I typically expect as much in a ‘book one’ of a series, especially one that features a fairly sheltered princess. I was happy to read that in spite of this, she still showed a strong sense of morals, fire, and spine. Now our MMC? Kairos Draven, aka Void’s Edge. Oh, how I’m a sucker for a smoking’ hot grumpy warrior alpha with a witty mouth, and a strong sense of “touch her and die” attitude, so you know who held all my cards. That ending? Just made me swoon all the harder. Now add a battlecat that rivals the size of a horse…and well Ms. Briar Boleyn you have well and truly stolen my heart. I’m excited to see where the story goes from here, and follow along to see more of the characters growth. I went into this story fairly blind, and I think I enjoyed it all the more because of it. Once the story got going, it had me in an absolute chokehold and it was difficult to put down.
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Reviewed in the United States on May 12, 2024

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