Cindy 99 is a Blimburn Seeds take on the legendary Cinderella 99, a sativa-leaning hybrid loved for its uplifting high and fruity, tropical flavor. From Princess x Cinderella 88, it is a 70% sativa at 20-22% THC that grows tall and yields well. A happy, sociable effect and that famous sweet pineapple character make it a favorite for growers who want a classic, flavorful sativa.
This is a photoperiod feminized strain, so it flowers when you shorten the light cycle. The figures below are Blimburn breeder values; check your own pack for the exact numbers.
Recommended Strains
Cindy 99
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THC | 20% - 22% (Medium) |
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Lineage | Princess x Cinderella 88 |
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Type | Feminized |
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Height | 9.84 ft | 3 m |
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Yield | High |
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Yield Indoor | 1.47 - 1.8 oz/ft² | 450 - 550 g/m² |
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Yield Outdoor | 21.16 - 24.69 oz/plant | 600 - 700 g/plant |
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Flowering Time | 8 - 10 weeks |
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Phenotype | 30% Indica / 70% Sativa |
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Medical | Depression, Insomnia, Muscle Spasms |
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Effects | Happy, Relaxed, Talkative |
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Flavors | Fruity, Sweet |
Apple Fritter Seeds
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THC | 30% - 31% (High) |
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Lineage | Animal Cookies Strain x Sour Apple Strain |
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Type | Feminized |
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Height | 5.58 ft | 1.7 m |
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Yield | High |
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Yield Indoor | 1.97 - 2.13 oz/ft² | 600 - 650 g/m² |
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Flowering Time | 8 - 10 weeks |
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Phenotype | 50% Indica / 50% Sativa |
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Effects | Relaxed, Creative, Happy |
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Flavors | Apple, Earthy, Cheese |
Cindy 99 Grow Info
| Trait | Cindy 99 (Blimburn Seeds) |
| Genetics | Princess x Cinderella 88 |
| Seed type | Feminized (photoperiod) |
| Genetic profile | 70% sativa / 30% indica |
| THC | 20-22% (medium) |
| Flowering time | 8-10 weeks |
| Height | Up to 3 m outdoors, a very tall sativa |
| Indoor yield | High, 450-550 g/m² |
| Outdoor yield | 600-700 g per plant |
| Effects | Happy, relaxed, talkative |
| Flavor | Fruity, sweet, tropical pineapple |
These are Blimburn’s published figures for the Cindy 99 line at Growlantis. When you need an exact THC percentage, height, or yield, check the specification on your own Cindy 99 seed pack.
What Makes Cindy 99 Worth Growing
Cindy 99 carries the reputation of its Cinderella 99 heritage: a fast-finishing, flavorful sativa with a genuinely uplifting high. The flavor is the signature, sweet and fruity with the tropical pineapple character the line is famous for, and the effect is happy, sociable, and energizing rather than sedating.
It also performs in the garden. Potency sits at a solid 20-22% THC, and yields are high for a sativa at 450-550 g/m² indoors and 600-700 g per plant outdoors. The main thing to plan for is size, since this is a very tall plant, but it stays rewarding and manageable with a bit of training.
Is Cindy 99 Indica or Sativa?
Cindy 99 is sativa dominant, about 70% sativa and 30% indica, from the Cinderella 99 line. The sativa side leads clearly.
In the plant, that means a tall, open, vigorous structure with long branches that stretch hard in flower. In the high, it is happy, uplifting, talkative, and energizing, good for daytime and social use, with just enough indica to keep it comfortable. It is a daytime strain through and through.
Flowering Time and Total Grow Time
Because Cindy 99 is a photoperiod strain, two timing numbers matter, and they are not the same.
- Flowering time: 8-10 weeks. This is the bloom stage, and it starts only when you switch the lights to 12/12 indoors, or the outdoor days shorten in late summer.
- Total grow time (seed to harvest): flowering plus your veg period. Veg length is yours to set, so a typical indoor run from seed lands around 12-16 weeks depending on how long you veg.
The practical point is that the 8-10 week figure is the flowering window, not the whole grow. On a plant this tall, veg length is the main lever for final size, so keep it short indoors.
Does Cindy 99 Need a 12/12 Light Cycle?
Yes. Cindy 99 is a photoperiod strain, so indoors it needs a 12/12 light cycle to start flowering. You keep it under a longer schedule, usually 18/6, through veg, then switch to 12 hours on and 12 off to trigger bloom.
Outdoors the season does this for you, with flowering beginning as the days shorten in late summer. This is the key difference from an autoflower, which blooms on age no matter the light schedule.
Cindy 99 Grow Timeline, Week by Week
Veg length is up to you, so the flowering weeks are the fixed part, and on a very tall sativa the flip timing is critical.
- Weeks 1-2: germination and seedling. The taproot and first leaves establish. Keep water light and conditions stable.
- Weeks 3-5: vegetative growth. The plant builds height fast. Top and train early, and keep veg short indoors to control size.
- Flip to 12/12: switch the light cycle when the plant is about half its target height, since a sativa can double in size during the stretch.
- Flower weeks 1-3: a big stretch. Set your trellis and ties now.
- Flower weeks 4-8: buds form along the long branches and fill in, and the sweet pineapple aroma builds.
- Flower weeks 8-10: ripening and harvest. Judge by the trichomes, not the day count.
Choosing Your Setup: Space, Light and Pots
Height is the first thing to plan for. Cindy 99 can reach 3 m outdoors, so indoors it is not a plant you flip tall in a short tent. Keep veg short, commit to training, and give it vertical room, or grow it outdoors where the size pays off in yield.
Light should be strong and even to fill out the long, spaced buds. A full-spectrum LED at 30-40 watts per square foot over a trained, flat canopy gets the most from the high yield. Pair it with strong exhaust, since a big plant moves a lot of air.
For containers, use 5-7 gallon pots indoors, or larger fabric pots and open ground outdoors. As a photoperiod, it transplants fine, so you can pot up as it grows.
Germinating and Raising Seedlings
The paper towel method is the easy, reliable start. Soak the seeds for 12-24 hours, then set them between damp paper towels on a covered plate, kept dark and warm at 70-85°F (21-29°C). A taproot usually shows in two to three days.
When the root reaches about 1-2 cm, plant it root-down a knuckle deep in a light, airy mix and keep the surface moist until it breaks ground. New to germination? Our beginner growing guides walk through it step by step.
The Vegetative Stage and Training
This is where you tame a very tall sativa. Because Cindy 99 is a photoperiod plant, you control the size by choosing veg length and using the full training toolkit.
Top the plant early to break the dominant cola into several, then use a SCROG net or LST to spread the branches into a wide, even canopy. On a plant that can triple in size, this is essential indoors. Keep nitrogen available through veg, and remember it stretches hard for two to three weeks after the flip, so flip early, before it gets near your ceiling.
Feeding and Watering Cindy 99
Feed to the plant’s size. A big, vigorous sativa can take a fuller nutrient schedule than a compact indica, but build it up gradually and read the leaves. Use a nitrogen-forward base through veg, then shift to a bloom formula higher in phosphorus and potassium once you flip to 12/12.
Water by root-zone moisture. A large plant drinks heavily in late veg and early flower, so expect demand to climb, and let the top layer dry between waterings to keep oxygen at the roots.
Flowering and Knowing When to Harvest
Once you flip to 12/12, the plant stretches hard for two to three weeks, then settles into bud production along its long branches. The sweet, tropical pineapple aroma builds, so a carbon filter is essential indoors, with good airflow around the spaced colas.
As the 8-10 week window closes, let the trichomes decide. Harvest when most are cloudy; a few extra days of amber add weight to the otherwise energetic high. After the cut, hang the branches in the dark at about 60°F (15-16°C) and 55-60% humidity for 7-14 days, then cure in jars, burping daily for the first weeks to protect that fruity flavor.
Growing Indoors vs Outdoors
Indoors, the challenge is height. Keep veg short, flip early, and train hard into a flat canopy under strong light. Done right, the high indoor yield of 450-550 g/m² is very reachable.
Outdoors is where Cindy 99 really stretches out, reaching 3 m and returning a big 600-700 g per plant in a sunny spot with good soil. Plant after the last frost, give it space and strong sun, and stake the long branches as the colas get heavy.
How Tall and How Much? Height and Yield
Plan for size. Cindy 99 can reach 3 m outdoors, so it needs either open sky or a committed indoor training plan. Flipping to 12/12 early and topping are the two main ways to keep it in bounds.
Yield is a strong point: a high 450-550 g/m² indoors under good light and a well-filled canopy, and a big 600-700 g per plant outdoors. The reward for managing the height is a genuinely productive, flavorful sativa.
Best US Climates for Cindy 99
Cindy 99 suits warm, sunny climates with a long season best. Growers in California and the warm West get the sun and time a tall sativa loves, with huge outdoor plants and easy finishes.
Its 8-10 week flowering, fast for a sativa, also helps it work in temperate states with a long enough season, though its height makes it a commitment outdoors. In the humid Southeast, the open sativa structure helps airflow, but watch the denser sections late in flower. For another tall sativa, see our BC Diesel grow guide.
Common Problems When Growing Cindy 99
Most issues trace back to its size and sativa habit.
Running out of vertical space
At up to 3 m with a big flowering stretch, Cindy 99 overgrows a short tent fast. Keep veg short, flip to 12/12 early, and top plus SCROG to hold a flat canopy indoors.
Flipping to 12/12 too late
A sativa can double or more in height after the flip. Waiting until it is already near the light puts the colas into the lamp. Flip at about half your target height, earlier than you would for an indica.
Underestimating the smell
The sweet, tropical terpenes are strong in flower. Without a carbon filter and good ventilation, the aroma carries, so plan odor control before flowering starts.
Treating it like an autoflower
This is a photoperiod plant. It will not flower under 18/6 and needs the light switched to 12/12 indoors. If you want a strain that flowers on its own, choose an autoflower instead.
Making the Most of Your Harvest
Do not waste the trim. The sugar leaves make good bubble hash, dry sift, or infused oil, and a big sativa leaves plenty. The stems, roots, and fan leaves compost well and feed your next grow.
Is Cindy 99 Right for You?
If you want a classic, flavorful sativa with a sweet pineapple taste and an uplifting daytime high, yes, as long as you have the height to spare outdoors or the will to train indoors. It is a rewarding, high-yielding plant. If vertical space is tight, a compact indica or an autoflower will be an easier fit. For another tall sativa, see our BC Diesel grow guide.
Frequently Asked Questions
Is Cindy 99 indica or sativa?
Cindy 99 is sativa dominant, about 70% sativa and 30% indica, from the Cinderella 99 line. It grows tall and open like a sativa and gives a happy, uplifting, talkative, energizing high that suits daytime and social use. The small indica share keeps it comfortable, but this is firmly a daytime strain.
Does Cindy 99 need a 12/12 light cycle?
Yes. Cindy 99 is a photoperiod strain, so indoors it needs the light switched to 12/12 to start flowering. You veg it under a longer schedule like 18/6, then flip to 12 hours on and 12 off. Outdoors it flowers naturally as late-summer days shorten.
How long does Cindy 99 take to flower?
Cindy 99 flowers in about 8 to 10 weeks once you switch to 12/12, fast for a sativa. That is the bloom stage only. Total time from seed also includes your veg period, which on a tall plant you often keep short to control size, so plan around flowering plus veg.
How tall does Cindy 99 grow?
Cindy 99 is a very tall sativa, reaching up to about 3 m outdoors or with a long veg. Indoors you control the height by vegging less, flipping to 12/12 early, and topping. Expect it to stretch hard for two to three weeks after the flip, so leave plenty of clearance or grow it outdoors.
How much does Cindy 99 yield?
Cindy 99 is a high yielder, around 450 to 550 g/m2 indoors under strong light and a well-trained canopy, and a big 600 to 700 g per plant outdoors. Light intensity, canopy management, and root space are the main factors, and managing the height well is what lets it fill out.
What does Cindy 99 taste like?
Cindy 99 is known for a sweet, fruity flavor with the tropical pineapple character its Cinderella 99 line is famous for. The taste comes through strongest after a careful dry and cure, so take your time at harvest to protect those bright, sweet, tropical notes in the finished flower.
Can you clone Cindy 99?
Yes. As a photoperiod strain, Cindy 99 clones well, unlike autoflowers. Take cuttings from a healthy plant during veg, root them, and keep them under long light until you are ready to flower. Cloning lets you keep a favorite pineapple-flavored phenotype and skip germination on your next run.
