How to Grow Cereal Milk Seeds in 2025 (Week-by-Week Grow Diary)

Cereal Milk stands out for its creamy berry flavor, tropical undertones, and balanced sativa-dominant effects. With THC levels reaching up to 27% and a calming, creative high, it’s a favorite among growers who want top-shelf buds with therapeutic potential. In this week-by-week grow diary, we’ll show you exactly how to grow Cereal Milk seeds from setup to harvest, whether you’re running an indoor tent or letting her stretch under sunny skies. Let’s dig in.

🛒 Shop Cereal Milk seeds

TL;DR: How to Grow Cereal Milk Seeds

• Genetics: Cookies × Cherry Pie × Snowman
• Type: 60% Sativa / 40% Indica
• THC: Up to 27%
• CBD: Up to 5%
• Flavor: Berries, Creamy, Sweet, Tropical
• Effects: Calming, Creative, Therapeutic
• Height: 50–60 inches
• Indoor Yield: 1.3–1.5 oz/ft²
• Outdoor Yield: 17–20 oz/plant
• Flowering Time: 8–10 weeks
• Harvest (Outdoor): End of September to early October
• Difficulty: Moderate; responds well to LST and defoliation
• Best Regions: Coastal CA, Southern US, Mediterranean climates

Setup & Prep: Growing Cereal Milk Seeds

Before popping your seeds, get your environment dialed in. Cereal Milk prefers stable temps, balanced humidity, and moderate feeding. With her 60/40 sativa-lean, expect medium height and wide lateral branching, perfect for tents or outdoor beds.

🛠️ Materials Checklist

Indoor Grow:

• 2×4 or 4×4 grow tent
• LED grow light (250–400W recommended)
• 5-gallon fabric pots
• Carbon filter & fan system
• Light timer
• Hygrometer + thermometer
• Nutrient kit (veg + bloom)
• pH meter + pH up/down
• Soil or coco/perlite mix

Outdoor Grow:

• 10–15 gal fabric pots or raised beds
• Compost-rich soil with good drainage
• Shade cloth (optional for harsh sun)
• Trellis or stakes
• Rain cover (if in wet/humid region)

🌡️ Ideal Conditions

🎯 Before germinating, make sure your space is stable and all equipment is working properly. Starting strong leads to fewer problems down the line.

Germination: Start Your Cereal Milk Seeds Right

Getting Cereal Milk seeds off to a strong start begins with proper germination. We recommend the paper towel method; it’s reliable, fast, and ideal for photoperiod feminized seeds like this one.

🔁 Germination Steps

1. Moisten two clean paper towels with water (damp, not soaked).
2. Place your Cereal Milk seeds between them.
3. Set the towels between two paper plates (or inside an open plastic container).
4. Store in a warm, dark space (70–85°F / 21–29°C).
5. Check after 24–72 hours. Keep towels moist but never wet.
6. Once the taproot is ½–¾ inch, transplant carefully into soil or starter cubes.

📛 Avoid common mistakes:

• Do not soak seeds overnight; this may cause rot.
• Do not seal seeds in an airtight container or plastic bag.
• Do not expose sprouted seeds to light or cold air.

📖 Need more help?
Check out our complete Germination Guide for Photoperiod & Autoflowering Cannabis Seeds for visuals and extra tips.

Week 1: Seedling Stage

Once your Cereal Milk seed sprouts and is placed into its final medium, it enters the seedling phase. This week is all about establishing roots and keeping stress low.

✅ What to Expect

• Height: 1–3 inches
• Leaves: Cotyledons open, followed by first true serrated leaves
• Growth Rate: Slow and steady; don’t expect much vertical movement yet
• Smell: None

🌡️ Environment Targets

• Light Schedule: 18/6 (18 hours on, 6 off)
• Light Distance: 24–30 inches above canopy
• Temperature: 75–78°F
• Humidity: 70–80%
• Watering: Light misting or small watering at base
• pH: 6.0–6.2

🧪 Nutrients

• No nutrients yet (or very light seedling-specific formula)
• Optional: Add beneficial microbes or root booster (very diluted)

🧹 Tips

• Avoid overwatering; soggy roots = stunted growth
• Place a humidity dome or plastic cup on top for RH control
• Keep airflow low but consistent to prevent mold and damping off

🪴 By the end of Week 1, your Cereal Milk should be small, healthy, and ready to kick off veg.

Week 2: Early Vegetative Growth

This week, your Cereal Milk seedling transitions into full vegetative mode. Expect more sets of leaves, increased height, and a visible shift in energy. If you’re growing multiple phenos, this is when early vigor differences start to show.

✅ What to Expect

• Height: 3–6 inches
• Leaves: 3- and 5-finger fan leaves appear
• Growth Rate: Picking up, daily change now visible
• Smell: Still minimal, but leaves are rich green

🌡️ Environment Targets

• Light Schedule: 18/6
• Light Distance: 20–24 inches
• Temperature: 72–77°F
• Humidity: 60–70%
• Watering: Increase volume slightly; water around edges of pot
• pH: 6.2–6.4

🧪 Nutrients

• Begin light vegetative nutrients (¼–½ strength)
• Optional: Add mycorrhizae to promote root expansion
• Continue CalMag (especially in coco)

🧹 Tips

• Begin gentle LST (low stress training) if plants are stretching
• Remove humidity dome if still in place
• Prepare for transplant if in small starter pots

🪴 By the end of Week 2, your Cereal Milk should have multiple nodes and be ready for shaping.

Week 3: Strong Veg & Shaping

Your Cereal Milk is now growing quickly, developing a fuller canopy and stronger lateral branches. This is the ideal window to shape her for maximum yield and airflow, especially with a sativa-leaning hybrid like this one.

✅ What to Expect

• Height: 6–10 inches
• Leaves: Large 5- and 7-finger fan leaves
• Growth Rate: Rapid; new nodes forming every 1–2 days
• Smell: Faint fruity notes may appear if touched

🌡️ Environment Targets

• Light Schedule: 18/6
• Light Distance: 18–22 inches
• Temperature: 72–77°F
• Humidity: 55–65%
• Watering: Water to light runoff if in final pot
• pH: 6.2–6.5

🧪 Nutrients

• Increase veg nutrients to ½–¾ strength
• Add CalMag if using RO water or coco
• Watch for early deficiencies (especially nitrogen)

🌿 Training & Maintenance

• Continue LST by tying branches away from the center
• Top if not already topped at the 4th–5th node
• Gently defoliate large fan leaves blocking inner growth
• Rotate plant daily for even structure

🪴 By the end of Week 3, your Cereal Milk should have a low, bushy shape with plenty of exposed nodes, setting the stage for a big yield.

Week 4: Pre-Flower Stretch Begins

This week marks the end of full veg. Your Cereal Milk will begin showing signs of sexual maturity and stretch as it prepares for flowering. Now’s your moment to lock in the shape of the plant.

✅ What to Expect

• Height: 10–14 inches (vertical stretch begins)
• Leaves: Lush canopy, full of new growth
• Growth Rate: Accelerating, nodes stack faster
• Pre-flowers: Pistils may appear at internodes
• Smell: Subtle berry-cream scent emerges

🌡️ Environment Targets

• Light Schedule: 18/6 (flower switch next week)
• Light Distance: 18 inches
• Temperature: 72–76°F
• Humidity: 50–60%
• Watering: Increase volume as roots expand
• pH: 6.3–6.5

🧪 Nutrients

• Max out veg nutrients (¾–full strength)
• Optional: Begin transition formula with added P/K
• Watch for signs of overfeeding as growth speeds up

🌿 Training & Pruning

• Final week for LST or topping
• Clean up lower growth if light won’t reach it
• Tuck or remove fan leaves crowding the center
• Consider lollipop technique (light pruning below 1st node)

🪴 By the end of Week 4, Cereal Milk should be lush, symmetrical, and ready to flip into flower.

Week 5: Early Flower Begins

Your Cereal Milk plants are now officially in bloom. The light cycle is flipped to 12/12, triggering hormone changes that shift energy from leaf and root growth into bud production. Stretch continues, and white pistils will begin to emerge in clusters.

✅ What to Expect

• Height: 14–20 inches (continued vertical stretch)
• Bud Sites: Forming at nodes, pistils clearly visible
• Leaves: Rapid new leaf and sugar leaf development
• Smell: Sweet, creamy, and fruity scents get stronger

🌡️ Environment Targets

• Light Schedule: 12/12
• Light Distance: 16–18 inches
• Temperature: 70–75°F
• Humidity: 45–55%
• Watering: Regular schedule, but avoid soggy medium
• pH: 6.3–6.6

🧪 Nutrients

• Transition to bloom nutrients with higher phosphorus and potassium
• Reduce nitrogen slightly
• Continue CalMag support
• Optional: Add silica for stem strength

🌿 Training & Maintenance

• Stretch continues, adjust ties or trellis if needed
• Perform light defoliation to improve light penetration
• Watch for early signs of herming (rare but possible under stress)

🪴 By the end of Week 5, you should see strong pistil production, tight internodes, and the signature structure of Cereal Milk starting to take shape.

Week 6: Mid-Flower

This week, Cereal Milk starts stacking real weight. Buds swell at each node, pistils multiply, and sugar leaves begin to sparkle with trichomes. You’ll notice the aroma deepen into creamy berries and tropical sweetness.

✅ What to Expect

• Height: 20–25 inches (stretch slows)
• Buds: Forming dense clusters at each cola
• Trichomes: First visible layer of frost appears
• Smell: Stronger, more pungent — sweet, creamy, and tropical

🌡️ Environment Targets

• Light Schedule: 12/12
• Light Distance: 14–18 inches
• Temperature: 70–75°F (night: 65–68°F for color potential)
• Humidity: 40–50%
• Watering: Consistent, allow near-dry topsoil between
• pH: 6.3–6.6

🧪 Nutrients

• Full-strength bloom nutrients
• Add P/K booster (optional)
• Avoid excess nitrogen; focus on bud development
• Continue CalMag

🌿 Maintenance

• Final defoliation if needed; clear inner fan leaves blocking light
• Adjust airflow to prevent moisture buildup in buds
• Avoid stressing the plant; she’s focusing all energy on flowering now

🪴 By the end of Week 6, your Cereal Milk colas should be well-formed, sticky to the touch, and smelling delicious.

Week 7: Late Flower

This is when Cereal Milk starts frosting up for real. Buds swell, pistils darken, and trichomes turn from clear to cloudy. Terpenes peak, delivering that creamy berry funk this strain is known for. Your job now is to keep conditions stable and resist the urge to harvest too early.

✅ What to Expect

• Height: 25–30 inches (final stretch ends)
• Buds: Fat, dense, and sticky
• Trichomes: Cloudy with some amber starting
• Pistils: 50–70% darkened
• Smell: Intense, creamy, fruity, slightly gassy

🌡️ Environment Targets

• Light Schedule: 12/12
• Light Distance: 14–16 inches
• Temperature: 68–73°F
• Humidity: 40–45% (drop RH slightly to avoid mold)
• Watering: Reduce slightly, focus on dry/wet cycles
• pH: 6.3–6.6

🧪 Nutrients

• Continue bloom nutrients
• Optional: Introduce flush around Day 49 if harvesting early Week 9
• Some growers begin tapering P/K at this point (optional)

🧹 Tips

• Use a jeweler’s loupe or digital microscope to monitor trichome color
• Increase airflow to keep buds dry
• Watch for foxtailing (especially under high light intensity)
• Don’t panic if lower leaves start yellowing, that’s normal at this stage

🪴 By the end of Week 7, Cereal Milk’s buds should be glistening and nearing peak potency. The finish line is in sight.

Week 8–9: Flush & Harvest

Cereal Milk finishes flowering around 8 to 10 weeks, depending on pheno and environment. This is where your patience really pays off; rushing now can cost you in flavor, potency, and smoothness. Monitor trichomes daily and prepare for flush and chop.

✅ What to Expect

• Height: 30–32 inches
• Buds: Fully swollen, sticky, trichome-covered
• Trichomes: 80–90% cloudy, 10–30% amber = peak harvest
• Pistils: Mostly orange/brown and curled
• Smell: Pungent, creamy, sweet, and tropical; loud in the grow space

🧪 Flush (Optional but Recommended)

• Start flush 7–10 days before harvest
• Water with plain, pH-balanced water (no nutrients)
• Runoff should drop below 300 ppm by harvest day
• Some growers use flushing agents (optional)

🌡️ Environment Targets (Final Week)

• Temperature: 65–70°F
• Humidity: 40% or lower
• Light Distance: Keep steady, dim slightly if fading leaves aggressively
• Dark Period (optional): Some growers give 24–48 hrs of darkness before harvest to boost trichomes (up to you)

🪴 When 10–30% of your trichomes turn amber and pistils have darkened, it’s time to harvest. Congratulations, you made it.

Drying & Curing Your Cereal Milk Harvest

Now that your buds are trimmed and ready, the drying and curing phase ensures your hard work delivers top-shelf results. Rush this step and you’ll end up with harsh, grassy-smelling flower. Do it right, and you’ll enjoy sweet, creamy perfection in every hit.

🌫️ Drying Phase (7–14 Days)

Hang trimmed or whole plants upside down in a dark, ventilated room.

• Temperature: 60–70°F
• Humidity: 50–60%
• Airflow: Gentle, indirect circulation (use oscillating fan, not directly on buds)
• Darkness: Total darkness is ideal
• Drying Goal: Stems should snap (not bend) when dry

🫙 Curing Phase (2–8 Weeks)

Once dry, transfer buds into airtight glass jars (not plastic or bags).

• Jar Type: Mason or CVault jars
• Fill Level: 65–75% full; allow air space
• Burping:
  • First 7–10 days: Open jars 1–2 times daily for 10–15 mins
  • After day 10: Open every 2–3 days
• Humidity Packs (Optional): Add 62% Boveda packs to stabilize RH
• Ideal Internal Jar RH: 58–62%

🪴 Cereal Milk reaches its true potential after a slow, cool cure. Expect that creamy-sweet flavor and balanced high to intensify by Week 3 of curing, and continue evolving for months.

Final Thoughts: Mastering How to Grow Cereal Milk Seeds

Growing Cereal Milk seeds is a rewarding experience for any cultivator, beginner or seasoned. With its balanced genetics, heavy resin production, and smooth, dessert-like flavor profile, it’s no surprise this hybrid is making waves among American growers.

Whether you’re dialing in a dialed-in tent grow or letting her stretch under the sun, following this week-by-week grow diary can help you get the most out of her creamy, berry-forward buds.

👉 Want to try this strain yourself? Shop Cereal Milk Seeds from Hypno Seeds
🔗 Learn more about the Cereal Milk strain on Leafly