Albino Melmak TP — Ready-to-Grow Bag XL — Cloud920®

AMTP combines the thick, massive build of Melmak PE with a full stable albino phenotype isolated by Basidium Equilibrium. Snow-white fruits, heavy blue bruising, and extreme potency — this is a top-shelf PE hybrid for growers who know what they're doing.

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AMTP — Albino Melmak Thick Penis — is what happens when two of the most extreme Penis Envy lineages get crossed into a single strain. Take the massive, contorted build of Melmak PE and lock it into the full albino phenotype of True Albino Penis Envy, and you get AMTP: snow-white, very thick stems, wavy irregular caps, and top-of-the-chart potency. This is not a beginner strain. This is a top-shelf cubensis hybrid for growers who already know their way around PE genetics and want something genuinely rare on the shelf.

Part of the Cloud920® Genetic Series — Hybrid Fusion


Origin & Genetics

AMTP is a direct hybrid of two legendary parent strains. The first parent is Melmak PE — also known as Homestead Penis Envy — a heavily mutated Penis Envy variant developed through decades of selective breeding by the Homestead Book Company in the Pacific Northwest. Melmak is famous for its gnarly contorted thick stems, wavy split caps, and above-average PE potency. Individual fruits regularly break into the "100 club" — specimens over 100 grams fresh. The name itself is a nod to the fictional home planet of ALF, the 1980s TV alien, referencing how otherworldly this mushroom looks. The second parent is True Albino Penis Envy, isolated by mycologist Basidium Equilibrium (Bas). Unlike leucistic or partially white PE variants, True Albino PE carries a stable, generation-to-generation full absence of pigmentation — complete white, cap to base. AMTP combines both: the dense massive Melmak build with a stable true albino expression. The fruits come out snow-white with heavy blue bruising that signals high psilocybin concentration, and the caps stay wavy and irregular in classic Melmak fashion — not flat, not uniform.


Melmak PE, True Albino PE, or AMTP?

All three share the same Penis Envy lineage, but they grow and look very differently:

Melmak PETrue Albino PEAMTP ✦
TypeHomestead PE mutationStable albino PE isolationHybrid: Melmak × True Albino PE
Cap colourGolden brown, wavySnow-white, compactSnow-white, wavy
Stem buildVery thick, contortedThick, robustVery thick, dense
Albino phenotypeNoYes (stable)Yes (stable full albino)
BruisingHeavy blueHeavy blueHeavy blue
Potency★★★★★☆ (5/6)★★★★★★ (6/6)★★★★★★ (6/6)
ColonisationModerate–slowSlowSlow (3–5 weeks)
DifficultyIntermediateAdvancedAdvanced

What makes AMTP genuinely different from every other PE variant in the assortment is the combination. You get the iconic massive Melmak body — thick contorted stems, wavy caps, the "100 club" potential — but expressed through a stable full albino phenotype. Snow-white fruits, every flush. Heavy blue bruising on contact. Visually unlike anything else on the shelf, and with peaks documented above 1.3% total tryptamines, it hits as hard as it looks.


Why Choose AMTP?

  • Strength: ★★★★★★ (6/6) — top of the Cloud920 potency range. Average total tryptamines around 0.78%, peaks above 1.3%. Start low at 1–1.5g, even if you're experienced with other PE strains.
  • Full stable albino phenotype — not leucistic, not partial. Snow-white fruits every single flush, straight from Basidium Equilibrium's True Albino PE genetics.
  • Melmak body, albino skin — very thick dense stems and wavy irregular caps from the Melmak side, full albino expression from the TAP side. The visual result is unlike anything else in the assortment.
  • Heavy blue bruising — clear indicator of high psilocybin concentration. Handle the fruits gently at harvest.
  • Recommended for experienced growers — AMTP colonises slowly (3–5 weeks is normal). Patience is the price of admission. Do not panic in the first weeks.


What's in the Box

  • 1x Cloud920 Grow Bag — 2000cc pre-colonised substrate with active AMTP mycelium. Integrated micron filters provide passive air exchange and contamination protection.
  • 1x Large bag clip — to seal the bag securely between ventilation sessions.
  • 1x Rubber band — place around the substrate block to prevent unwanted side growth.


How the Cloud920 Grow Bag Works

  • Open once — fold the bag open in a clean space to allow fresh air in and trigger pinning.
  • Place and wait — put the bag in indirect light at 23°C. No soaking, no misting required in the first phase.
  • Ventilate daily from day 10 — briefly open the bag, press out stale air, let fresh air in, close again (under 30 seconds). Stop when pins appear; resume daily ventilation between flushes.
  • Harvest and repeat — see "When to harvest" below for the right timing. Twist and pull at the base. Rehydrate and repeat for additional flushes.


When to harvest Albino Melmak TP

Albino Melmak TP is a top-shelf albino hybrid and does not follow the classic "harvest when veil breaks" rule. Its veils often tear early — sometimes just a day or two after pins form — and this is not the harvest signal. Wait for these two indicators:

  • Cap edges curl upward — when the caps have fully opened and the edges start to curl or flip up, growth has completed. Do not pick when caps are still expanding.
  • Marshmallow-soft stem — gently squeeze the stipe near the base (through the bag is fine). If it feels like celery or a firm apple, wait. If it gives like a slightly deflated marshmallow — springy but soft — harvest now.

AMTP inherits Melmac PE-style dense stipes, so the marshmallow-soft test is especially reliable — the stem is thick enough that changes in firmness are easy to feel through the bag.

Picking at veil break means harvesting too early and leaving significant size, weight and potency on the table. For full harvest guidance across all strains, see our harvest guide.

The Cloud920 Ready-to-Grow bag does not include printed instructions. You can find the detailed instructions online here.

⚠️ Important: Due to the extreme potency of AMTP, approach dosing with caution. Effects are significantly stronger than standard cubensis — beginners should start with reduced amounts. Also: do not panic if colonisation looks slow during the first weeks. 3 to 5 weeks is normal for this strain.

Additional Info
Additional Info
Productcode MCS.GKC920.AMTP-XL
Weight (KG) 1.4000
Mushroom Strain Albino Melmak Thick Penis
Brand Cloud920® Grow Bag
Difficulty Difficult
Size Extra Large
Species Psilocybe cubensis
Origin Hybrid
Potency Very High
Optimum cultivation temperature 23ºC
Yield (from) 400 grams
Yield (to) 800 gram
Water Spray Needed No

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Patience is rewarded Review by Rick
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Slow and steady grower, very good quality mushrooms will definitely buy again. (Posted on 7/19/2026)

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