8 Tips for Cultivating Cinderella 99 Marijuana: Growing Guide

The subject of today’s growing guide has something of a legend attached to its origins. Supposedly, Mr. Soul of Brothers Grimm found some seeds in a 2-gram package of Jack Herer he bought in a coffee shop in Amsterdam.

Mr. Soul grew these seeds and named the strain Princess. Next, he crossed Princess with Café Girl and Genius to create Cinderella 99, a.k.a. C99 or Cindy. Even if this story isn’t true, Cinderella is likely a Jack Herer phenotype.

Keep reading this growing guide for Cinderella 99 to learn some essential tips about growing this sativa-dominant strain.

Tip #1 – Cinderella 99 Strain Review

If you are using Cinderella 99 for the first time, watch out for the delayed onset of its effects. Users say that its effects generally take at least 15 minutes to kick, so be careful not to overconsume. When they do, the effects are typically uplifting, euphoric, and energizing.

Cinderella 99’s effects are typically uplifting, euphoric, and energizing.

Cinderella 99’s THC content ranges between 18% and 22%, and it contains low levels of CBD, usually less than 1%.

Tip #2 – Difficulty Growing – Is Cinderella 99 For Experts Only?

Cinderella 99’s growth difficulty is classified as easy to moderate. This strain is highly disease-resistant as long as it is kept dry.

Another critical aspect of growing Cinderella 99 is keeping the humidity of your grow room in check. During the vegetative stage, start with a humidity level in the 55-65% range, and reduce it to 40% by the flowering stage.

If the relative humidity (RH) of your grow room exceeds 65% for an extended period, it increases the risk of mold and mildew. However, if the RH goes below 30%, it slows plant growth and hinders photosynthesis. Therefore, a hygrometer is an essential purchase for measuring the humidity level of your grow room.

One of the simplest and best ways to control humidity is through good ventilation. You can reduce the humidity level by increasing the amount of air exchanged in the room.

Tip #3 – Cinderella 99 Growing Techniques

The problems caused by excessive humidity levels are exacerbated with thick sativa-dominant hybrids such as Cinderella 99. It needs to be topped and trained for an even canopy, allowing for good airflow throughout the plant.

Low-Stress Training (LST) is an excellent way to train a plant without damaging it. The LST method involves bending the branches of the plant as it grows and tying down extra-long branches.

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Pulling the top of your Cinderella 99 plants down in an ‘L’ shape will help ensure that the hormone auxin will be more equally distributed. The result is a faster-growing plant.

Use the green tape available from garden stores to tie down the branches. When you expose several bud sites, the colas of your plants will grow sideways and produce several more colas.

Tip #4 – How Big Is the Cinderella 99 Yield?

Cinderella 99 has a very high yield when you use clever growing tactics. While the yield is just 16 ounces per square meter indoors, it can reach a monstrous 35 ounces when grown outdoors. The combination of great taste, high THC, and large yield means that concentrate makers love Cindy.

If you want to make C99 concentrate at home, we urge caution. Many people use this strain to create butane hash oil, which is a dangerous solvent. It is easier and safer to make edibles instead of wax, shatter, or budder.

If you lack the skills to make edibles, find a Cinderella 99 cannabis oil and mix it with a fat or oil for a potent edible mix. If you would prefer to use C99 flower to make edibles, make sure you decarboxylate it in the oven first to unlock its THC.

Tip #5 – Feeding for Cinderella 99

As Cinderella 99 is an easy-to-maintain plant, there are no special feeding instructions. However, it grows best when fed organic nutrients.

The primary nutrients are nitrogen, phosphorus, and potassium (NPK). Provide C99 with lots of nitrogen in the vegetative stage and cut down as it blooms. A week or two before harvest, consider flushing your plants to remove excess nutrients. Otherwise, you may end up with an unpleasant taste of nitrogen.


Other crucial nutrients required when feeding Cinderella 99 include sulfur, magnesium, and calcium. Overall, marijuana plants need dozens of nutrients, although micronutrients are only required in relatively small amounts. They include cobalt, boron, copper, iron, manganese, chlorine, and silicon.

If you grow hydroponically, you have complete control over feeding. Remember, with great power comes great responsibility. Those who use a hydroponics system are more likely to either overfeed or underfeed their plants. When you use an organic ‘super soil,’ you add things like bone meal and bat guano to boost the soil’s nutrient level. If you do it right, you’ll only need to water the plants and occasionally add carbohydrates.

Tip #6 – Should You Grow Cinderella 99 Indoors or Outdoors?

Cinderella 99 can be grown outdoors in a suitable climate. It offers a higher yield when grown outside and is typically ready for harvest by the end of September.

While you get a lower yield indoors, growing this strain in controlled conditions makes life a lot easier. Its size and squat stature make it ideal if you have a tiny grow space. While you can grow it hydroponically, you will enjoy better flavors if you grow Cinderella 99 in soil.

Tip #7 – Cinderella 99’s Flowering Time

Cinderella 99’s flowering time is approximately eight weeks. With most hybrids, you get good results when you plant between 10 and 16 plants per square meter in 3-4-liter pots initially. After a maximum of three weeks in the vegetative stage, you begin the blooming stage and only need to top once.

If you have the time, resources, and patience, it is worth experimenting with this strain.

Cinderella 99 doesn’t necessarily respond to the above, as you might expect. If you have the time, resources, and patience, it is worth experimenting with this strain. Perhaps you can use larger but fewer pots, increase the vegetative stage duration, and top several times.

Tip #8 – What Is the Ideal Climate for Growing Cinderella 99?

Cinderella 99 is known for its deliciously sweet tropical taste. To maintain its flavor, grow it in a consistent climate between 68 and 80 degrees Fahrenheit. It is a high-yielding plant that thrives when exposed to a lot of sunshine outdoors and a lot of light when grown indoors.

Indoor Lighting Options

If you’re not fortunate enough to live in a warm, sunny climate, you can use artificial lighting to replicate it indoors. There are three common types of grow light that cannabis growers use:

  • High-Intensity Discharge (HID)

HID lighting has been upgraded, but the core principles remain the same. When growing marijuana indoors, choose 400W and 600W bulbs and make sure the lights are 12-20 inches above the plant canopy.

  • Compact Fluorescent Lights (CFLs)

CFLs are normally used in small grow rooms but can be very effective as an MH alternative. They work well within the cool white spectrum, and if you place a 250W CFL 4 inches above the canopy, it provides results comparable to those of a 400W HID bulb 12 inches away.

  • Light Emitting Diodes (LEDs)

The newest LED systems have caught up to their HID rivals. You can find high-performance kits that draw up to 400W and outperform 600W Metal Halide (MH) and High-Pressure Sodium (HPS) lights.

We hope that you find our growing guide for Cinderella 99 helpful. In the comments, let us know how you got on growing this strain.

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