cfl for growing weed indoors

Despite all my mistakes, I still got 6.2 ounces of dried buds off my first plant grown with this grow method!

This will start out with you watering the plants every couple of days, and may end up with you watering them once a day towards the end of the marijuana flowering cycle.

This easy indoor hydroponic cannabis grow guide uses common CFL bulbs as grow lights and forgiving coco coir as a growing medium. It’s designed for the beginner as a cheap and easy way to introduce yourself to growing marijuana.

Remember, you can start out with fewer lights and light sockets (start with 2 per plant), and will only need to get more as your plants get bigger. The great thing about all of the items needed for this technique is they can all be used in future grows, even if you decide not to continue with this method. For example, even if you end up getting more powerful grow lights eventually, you will always be able to use the CFLs for starting out new plants, or for adding additional side lighting.

Water your pot with coco coir thoroughly until water drains out the bottom before adding your seeds or clones.

Maintenance Cost: $50/month.

When growing with CFLs, it becomes harder and harder to fully illuminate the plants as they get bigger and grow more branches. You will maximize the total amount of buds you get by keeping the plant smaller (and therefore easy to bathe in light), and then harvesting more often since your plants will be ready to harvest much sooner.

Over the course of my first grow I made several mistakes, including dropping a light on one of my plants and accidentally burning some of the leaves on the lights. Every time something happened to a plant, it seemed to take it in stride and just keep growing.

This is important! Water your marijuana plants until you get at least 20% extra runoff water out the bottom.

How to get started.

By half the final desired height, I mean, if you wanted your plant to achieve a final height of 2 feet, then you would switch your marijuana to flowering when they’re about 1 foot tall, or half of 2 feet.

This is really a perfect way to grow your first harvest if you “just want to get your feet wet” because it’s low cost and so forgiving it’s hard to mess up. Plus, you will really learn an incredible amount about cannabis growing by using this method.

Your marijuana can’t get really get too much light from CFLs and the only thing you need to worry about with the CFLs is burning your plants if they get too close.

Then don’t water your marijuana plants again until the top of the coco coir starts feeling dry.

Watering Schedule.

If you wanted your marijuana to grow to be 5 feet tall, then switch them to flowering when they’re at a height of 2.5 feet.

If you notice that your plant is growing with a lot of space between nodes or otherwise seems like it’s ‘stretching’ upwards, that means that it probably needs more light. Try adding an extra CFL or two or move them closer. If you notice your plant is having any other issues or something doesn’t seem right, check out the Plant Problems and Symptoms Guide.

After your first grow, you will only need to get more plants, more coco coir, and more nutrients which will significantly bring down the start-up costs for subsequent grows.

It is a great way to learn about how marijuana plants grow and after doing one harvest yourself, I guarantee that you will start getting millions of ideas on how you want to do your next grow.

So, you can see that it doesn’t cost that much to get started growing cannabis with CFLs! After you get going you can expect to spend about $30/month in electricity, supplies, etc. considering an electricity price of After switching to 12-12, you should start noticing your plant making its first sex organs after a week or two. Females will grow white hairs and males will start growing grape-like balls..12/kWh (average cost of electricity in the US). So, if you harvest in 3.5 months, which is the average time, you’ll have spent about a total of $300 – $360 for your entire first grow, including setup, electricity, nutrients and maintenance. After that you can expect to pay about $100/grow since you won’t have to invest in most of the setup costs again.

That means you will choose either…

These lights are easily found at the store or online. You can get lower or higher wattage bulbs, but I like bulbs close to the 40w range because they produce a lot of light, but are still a small, manageable size.

To initiate the flowering stage, you will switch your light schedule so that your lights are on for 12 hours a day, and off for 12 hours a day.

The CFL bulbs should always be as close as possible to the plants, yet they need to be far enough away that your marijuana doesn’t grow into the lights and burn its leaves.

I recommend following the instructions exactly as provided by the nutrients.

You will want to start feeding your plants with nutrients at quarter strength for the first week, then work your way up to full strength slowly.

Setting up more than one bulb per socket can often be cheaper than buying an individual light socket for each light, especially if you buy online. It also is really convenient for arranging around your plant.

I used this technique for my first grow, and even though I made a lot of mistakes, my plants produced great buds.

That’s because growing weed with CFLs isn’t the highest yielding method. It doesn’t get the most yields for the electricity, it’s not suitable for a large grow, and it’s not going to work if you aren’t willing to watch over your plants closely throughout the grow.

This is what I use for each plant:

Light splitters like the following are a helpful way to get more CFLs in a smaller place. They also help you use less total light sockets which can save you some money.

Are willing to check on your cannabis every day.

Cheap to get started.

Any CFL will work for growing marijuana. Again, it’s much more important to get a high wattage than the right color spectrum. Wattage = light = yields. I’ve used 5500k photography CFL bulbs in the past and they worked well.

Dyna-Gro Grow & Bloom cannabis nutrients work great for growing marijuana. Use “Foliage Pro” for the vegetative stage and “Bloom” for the flowering stage (use at half strength compared to what it says on the bottle). The two-part nutrient system works great for growing cannabis in any grow medium!

Want to harvest about 1-3 ounces of bud.

Want to harvest more than a few ounces each grow.

How Many CFLs Do You Need To Grow Marijuana?

Start training when your plants are still young.

What Color CFLs Should I Get? (CFLs and Light Spectrum)

How many and what size CFL grow lights should you get to grow cannabis?

More Light = Better Results with CFLs. In fact you pretty much can’t really give your plant too much light when growing with CFLs (this isn’t true for all grow lights).

CFL stands for “compact fluorescent light” and even though these lights can be found at any hardware or grocery store, they actually give off a really great light spectrum for growing marijuana.

Plant twisty ties can easily hook around a cannabis stem, while the other side can be hooked to almost anything (like the pot)

Expect 1 ounce of bud for each.

“Baby Pic” Here’s a picture of one of my very first grows with CFLs. -Nebula.

Lots of growers will also build their own grow space, and this can be a good choice especially if you take time to make reflective walls and a way to exhaust heat.

In order to switch to the flowering stage you need to switch your CFLs to a 12/12 light schedule using a timer. This means that the plants should get 12 hours of light and 12 hours of dark each day. It’s really important to make sure the plant doesn’t get any light during the dark period. Light leaks cause problems! Your grow space needs to be completely light proof in the flowering stage.

pH Test Kit or Pen.

Having a Bigger Total Wattage is a Lot More Important Than Color Spectrum in CFLs.

Examples of Great Spots to Use CFLs.

B.) Medium Size CFL Bulb Setup <– Recommended.

CFLs are a great option if you…

“Will a 5500k or 5000k photography CFL bulbs work for growing weed? I know you’re supposed to get 6500k colored bulbs in the vegetative stage, and 2700k colored bulbs for flowering…”

Use the power of reflection to minimize light loss in your marijuana grow space. Cover your walls with something reflective like flat white latex paint (which has 85-95% reflectivity) and/or utilize reflectors to aim more light where you want.

Have lots of space; if you have at least 5 feet of height in your grow space, I recommend upgrading to a more efficient grow light.

When you’re buying CFLs, they come in different “color spectrums.” Some CFLs appear more orange/yellow, some are almost blue, and others almost look like bright white daylight on a sunny day.

CFL Grow Lights.

Note: sometimes either bulb is listed as “40 watt” or “42 watt”

Over the years I’ve seen many creative solutions for setting up CFLs above cannabis plants indoors! A large part of using CFLs is improvising ways to get them in a proper position close to your plants!

Growing cannabis with CFL lights is simple to set up and maintain. Each plant will require around 80 watts of light, although more can be better. Since CFL light bulbs for plant growth don’t produce enough light exposure beyond around 12 inches, the lights will have to be adjustable with height to account for plant growth.

You can grow marijuana with CFL grow light bulbs in soil or hydroponically. Regardless of the growing medium, light needs remain the same.

However, this doesn’t make or break your cannabis growing operation. If you don’t use a warm white CFL for flowering, you won’t ruin your marijuana. This advice is more about how to set up CFL grow lights in a perfect world.

CFL Light Bulbs For Growing Weed.

Let’s take a look at CFL lights for growing weed. There are quite a few options for lighting when looking to grow cannabis indoors. CFL lightbulbs are becoming more popular because they are beginner-friendly and easy to use. The best CFL lights for growing weed will help you produce more marijuana in small spaces than you thought was possible. If you have a small space that you want to utilize for growing ganja, CFL lights may be the best option!

When setting up something like a small CFL closet grow, you might want as little light as possible. Each cannabis plant will require around 80 watts of light, with more being better. Using 2 40 watt CFL bulbs is sufficient for a mini CFL grow.

While the wattage of the light produced by the CFL bulbs is more important than the spectrum of light, optimizing the spectrum is a good idea.

The sun produces about 100,000 lumens per square foot, so the closer you can get to this number, the more productive your marijuana plants will be. Building a hood for your CFL lights and concentrating them as close as possible during flowering will help mimic natural sunlight as much as possible.

If you are trying to do a single CFL grow operation with only one bulb, you need a small plant that flowers quickly, like an autoflower variety. Keep in mind that the yield of cannabis will be low with this setup. But, if you can’t spare more room than this, it’s still doable multiple times a year!

CFL is an acronym for compact fluorescent lighting. Compact fluorescent grow light setups are easy to build out because you can buy CFL grow bulbs at almost any store that sells light bulbs! They are just like fluorescent light bars seen in stores and offices but packed into a small lightbulb, allowing the user to reap the benefits of fluorescent light without a large lamp setup.

How To Grow With CFL.

The CFL light spectrum isn’t as important as the total wattage of the light produced when growing cannabis, but it doesn’t hurt to use daylight simulating CFL bulbs during the growing stage and soft-white CFL bulbs during the flowering stage.

To get big, productive buds when using fluorescent light bulbs for growing weed, you need the most light intensity that you can produce. This is the most important factor when flowering with CFL lights.

Cons.

As mentioned, the coverage of one CFL bulb will only produce enough light exposure to about 12 inches away from the bulb itself. This means that you’ll probably need multiple lights per plant to account for lateral growth.

CFL Grow Light Coverage.

Investing in a timer to turn the CFL lights on and off on an optimal schedule for the plant’s stages of life is a good idea. It’s also a good idea to invest in high-quality growing medium and nutrients to improve yields.

They come in a variety of different bases, so flexibility when designing a grow operation won’t be a problem. CFL lights don’t use excessive energy and don’t heat up as high as some other specialized grow lights for marijuana.

Pros.

Using CFL bulbs allows you to use daylight mimicking CFL bulbs during the vegetative stage of the plant’s life and use a softer light for the flowering cycle. You don’t want to use a soft white CFL for vegging as it is closer to the sunlight in Autumn when plants start to flower. However, if soft white is all you can find, it will still work as long as you have enough wattage to supply ample light to each plant.

Many novice cannabis growers do great with CFL setups during the vegetative stage but fail when the plants go to flower. If you want bigger, denser, more potent buds, you need maximal light intensity.