what to feed outdoor weed plants when flowering

by Prof. Brady Altenwerth Published 2 years ago Updated 1 year ago

Full Answer

What fertiliser should I Feed my cannabis plants?

Flowering cannabis plants need less nitrogen and more potassium to promote the growth of big, resinous flowers. During the first two weeks of flowering, most growers feed their flowering plants with a 5:7:10 fertiliser.

What nutrients do cannabis plants need during flowering stage?

However, during the flowering stage, more potassium nutrients are needed, followed by phosphorous and less nitrogen. Furthermore, during the cannabis transition stage (a.k.a. the first two to three weeks of the flowering stage), the plants will require similar cannabis nutrient ratios as in the vegetative stage.

What do cannabis buds need to grow?

In this phase, your plants will need a lot of CO2 (carbon dioxide) for growth and health. In weeks 4 to 6 of your cannabis flowering, the buds will get bigger and fatter. Once the flowers are showing as small white pistils (white wispy hairs), your plants will need more phosphor and potassium.

When should I Feed my outdoor cannabis plants?

Plus, added cannabis nutrients tend to leach out of the root zone. I always time my feeding of outdoor cannabis so that it occurs at the start or in the middle of a dry week, carefully watering my crop on the first day of a period when I know it won’t be raining for several days. For this, you’ll need accurate weather predictions.


What nutrients are best for flowering weed?

Top 5 Nutrients for Growing a More Sustainable Cannabis CropNitrogen. Nitrogen is by far one of the most essential nutrients of the cannabis plant. ... Phosphorus. Phosphorus is vital to the growth of a plant and is found in every living plant cell. ... Potassium. ... Calcium. ... Magnesium.

What is the best nutrients for outdoor weed plants?

The three primary nutrients required for cultivating marijuana are nitrogen, phosphorus, and potassium. During the vegetative phase, plants need more nitrogen in order to create the roots and leaves that serve as the base for flowering.

How often should you fertilize outdoor weed plants?

In general, marijuana fertilizer should be applied at least once weekly, along with an ample supply of pH-balanced water. As a rule of thumb, the ideal pH balance for marijuana grown in soil ranges between 6.0 and 6.8.

Should I water my outdoor weed plants every day?

Note how often you water plants and write it down in a log. Get your marijuana plants on a watering schedule—as they grow out of the seedling stage, watering every two to three days is ideal.

What is the root zone feed for rhinos?

This root-zone feed should also include potassium silicate in the form of Rhino Skin, B vitamins in the form of B-52, nutrients and beneficial compost tea compounds from Mother Earth Super Tea Organic, carbohydrates from Bud Candy, and humates and fulvates from organic Ancient Earth.

When does cannabis grow?

The plants maintain grow phase until July or August, gaining height and adding girth to the main stalk — although, pre-flowering is sometimes visible during these summer months. The heat of summer also indicates the most intense sunlight and the most stress for cannabis plants.

Can you transplant cannabis seeds into soil?

It isn’t enough to prep the ground and transplant into fertile soil. Rather, you’ll want to send precise nutritional elements directly into roots every time it rains, or every time outdoor cannabis plants are watered by hand or irrigation. Granules should dissolve quickly and be immediately available for uptake via plants’ roots.

Can you use liquid nutrients outdoors?

However, you can’t apply liquid nutrients outdoors the same way you’d apply them in an indoor grow op, because the root zone is a lot larger and may be exposed to drenching rains. Plus, added cannabis nutrients tend to leach out of the root zone.

When is the right time to buy weed seeds?

Timing is key when planning out your whole growing schedule. From the very start of the year up until the month you decide to have your harvests, everything in between will need an adequate plan set out for them. While it may sound a little crazy, there actually is a right time to even buy your weed seeds!

How much sunlight does a plant need to be vegging?

The standard lighting patterns for the vegging plants are generally set at 18 hours of sunlight per day.

How long does it take for weed seeds to germinate?

The window for germination will usually last for the whole month of March. Germination can last anywhere from 3 days to even 10 days, depending on how well you execute it.

How long does it take for marijuana to bloom?

The lighting patterns will be reduced from 18 hours down to an equal 12:12 ratio of light and darkness. Flowering usually takes no less than 7 weeks to fully bloom and develop the right amount of potency and consistency in the buds. Outdoors, this pretty much gives you a window for flowering from July up until mid-August of the growing schedule.

How to keep a close eye on your garden?

Also, having a calendar and marking all the important dates beforehand will allow you to keep a closer eye on the whole outdoor growing operation.

When is the best time to transplant seedlings?

Afterward, the heat of the Summer Solstice (mid-weeks of June) starts making its way into your gardens. The long hours of sunlight in addition to the winds and air circulation of the seasons make this a prime time for the transplanting of your seedlings into their final growing medium.

Can snow damage plants?

And lastly, of course, is the Winter Solstice in December. For the cold days of the winter, snow might cause some significant damage to your plants. In addition to increasing the water content of your buds, they can literally freeze and die out in cold climates.

Use short season strain

Marijuana plants fall under the “short day plant” category, which means that their flowering period is initiated once they have received uninterrupted darkness for a long time on a daily basis. This also means that other factors like humidity or temperature changes do nothing to trigger this flowering phase in your marijuana plants.

Force flowering

This is a technique used by many growers for all sorts of marijuana strains. You can force the flowering phase to begin earlier by ensuring your plants receive no light for at least 12 straight hours. Cover them with a cover of some sort, such as a tarp that is lightproof. You could begin this process as soon as the end of July.

Pollinate the flowers

This is an option you may not have thought of before, but will allow you to harvest far earlier than normal. If you pollinate the flowers, you can then harvest those plants just one week afterwards – right as your fertilized plants are beginning to make seed pods, but before the seeds are actually formed yet.

What nutrients are needed during the vegetative stage of cannabis?

For example, during the vegetative stage, more nitrogen and potassium nutrients are needed. However, during the flowering stage, more potassium nutrients are needed, followed by phosphorous and less nitrogen. Furthermore, during the cannabis transition stage (a.k.a. the first two to three weeks of the flowering stage), ...

What to know when growing cannabis outdoors?

This includes finding the right space to grow the plants, acquiring all the necessary resources and supplies, properly preparing for when harvest time arrives, making sure the plants receive enough sunlight, water, oxygen, ...

What are the nutrients in cannabis?

The two main stages of cannabis plants require different nutrients in different quantities. The three main cannabis nutrients that growers should use for their plants are nitrogen (N), phosphorous (P), ...

Why do cannabis plants have nutrient deficiencies?

In general, the most common reason why growers’ plants experience nutrient deficiencies is because the water’s pH level is too high or too low. When this occurs, the plants cannot absorb the cannabis nutrients.

Can too much fertilizer burn cannabis?

Sometimes, adding too much fertilizer and/or adding too many nutrients can cause problems such as the plants getting burnt. Therefore, it’s best to start simply, maintain consistency, and add in the right amount of cannabis nutrients at the right time to ensure an abundant harvest.

Do you need to mix cannabis with water?

No matter where you choose to grow your plants, it’s important to make sure that they receive all the oxygen, nutrients, and water they need. Some growers are unable to improve their cannabis plants’ soil directly; for them, it’s common to mix the necessary cannabis nutrients into the water.

What do Cannabis Plants Need?

Healthy marijuana plants require three elements for firm roots and vibrant flowers with high yields: Nitrogen (N), Phosphorus (P) and Potassium (K). You will often see these values displayed on packaging as NPK.

Coco fertilizers

Growing in coco coir, or coconut coir can have similar advantages to growing in a hydroponics system. Coir is the fiber that comes from the coconut husk, and it’s used in a variety of products (i.e., doormats) as well as by gardeners.

Increasing CO2

Fertilizers are not the only way to improve the health of your plant. You can also focus on the air.

Root pH

The best scenario is not needing to use fertilizer at all. You can do this by paying attention to your roots.

When to stop fertilizing

Honestly, there isn’t a definitive answer to when you should stop fertilizing. It really depends on the grower as everyone has a preferred way of doing things. You may choose to fertilize until harvest, or you can refrain from fertilizing days or even weeks prior to the end.

Frequent Nutrient Questions

Yes! Nature provides many options for both nutrients and pesticides when growing marijuana. I’ve only mentioned some of my favorites. Learn more natural alternatives in this article.

Can you burn a cannabis plant?

If you give your cannabis plants the right combinations at the correct time your plants will thrive but get the mix wrong and you can burn your plants or even kill them. Two of the cannabis plant life phases require marijuana fertilizer while generally, plants in the seedling stage don’t require additional nutrients.

Can you grow cannabis indoors?

There is no question, if you are growing cannabis indoors or out you should be using marijuana fertilizer to increase the speed of the plant’s growth but also to increase the bud yield. Without the correct nutrients at the right times, your plants won’t be big producers if they survive at all. Growing indoors under grow lights for 18-hour periods ...

Do you need a nutrient system for a bud?

The short answer is no, you don’t need a nutrient system, but it will hurt your yield not using one and can also make measurement and mixing of nutrients more difficult. You can get away with just NPK in the right amounts but don’t expect photo-worthy buds in return.

Is phosphorus good for marijuana?

Phosphorus increases the number of buds and potassium builds up the bulk in the buds. More marijuana fertilizer isn’t better for your plants, stick to your nutrients feeding guidelines carefully! Too many nutrients will burn or kill your plants, not enough and your plant’s performance will be lackluster. No matter what, don’t use time-released ...

How much humidity should I use for a cannabis plant?

When it comes to managing humidity during the flowering stage, keep your grow room between 45% humidity. While cannabis plants do love moisture, especially in the cloning and vegging stages, in the flowering stage you run the risk of powdery mildew on your buds with humidity anywhere about 50%.

How to make sure your plants are female?

You can make sure to have female plants by using feminized seeds. In week 3 or 4, the first real buds will show instead of only hairy pistils. The growth of the plant will now slow down a lot - it's important to watch out for the health of your plants at this point.

How long does it take for cannabis to grow?

The better your cannabis flowering stages are, the better your yield will be. The first 1 to 3 weeks of the flowering stage are a transition phase and your plants will still be growing. Your plants could double their height at this point depending on the type of strain you are using.

What happens when plants switch from vegetation to flowering?

When your plants switch from the vegetation to the flowering stage, the growth will eventually get slower. When the plants start to develop flowers (so called buds), it is time to treat them differently. This means changes in light and different nutrients for the flowering stage. While plants have been growing and prospering like crazy in ...

How high should I put grow lights on my plants?

If you're using a grow tent, be sure it has enough height for the lights to be at least 12-36 inches above the top of your plants' canopy. If you're using higher wattage lamps (1000W or similar), you should be at the top end of that range, and for lower wattage lamps (250W or similar) you can be at the low end of that range, but make sure you always have at least 12 inches.

When is cannabis ready to harvest?

Hardly any flowering cannabis will be ready for harvesting before week 8. You will be watching your plants closely at this point, treat them like a lady! Cater to all their needs. It also may be helpful to consider flushing them out using plain water for a few days before harvest.

When should I harvest my marijuana?

Between week 8 and 10, they should be ready for harvest depending on the strains. The intensity of the marijuana smell could be a good indicator. Your plants might start turning yellow at this point, which is what the plants normally do when they finish up the flowering stage.

How to learn about cannabis flowering?

The best way to learn about the cannabis flowering stages is to get some dirt and some weed seeds and to start growing your own plants. That said, it’s also super valuable to read up on growing marijuana. Here are some valuable resources from your pals at Honest Marijuana: How To Grow Weed: The Organic Way.

What are the parts of a cannabis flower?

Cannabis flowers have three parts: Pistils. Sugar leaves. Trichomes. The trichomes are where all the action is (they contain the highest concentration of cannabinoids), but the sugar leaves — which don’t look anything like the instantly recognizable fan leaf (or pot leaf) — also contain a fair bit of cannabinoids.

What is the flowering stage of cannabis?

The cannabis flowering stages are where all the action happens and your marijuana plant develops buds that you can then mix into a batch of cannabis oil , grind up and roll in a joint, ...

What happens in week 6 of cannabis flowering?

Three things happen as week six of the cannabis flowering stages rolls around: Buds will continue to grow and progress further toward ripening. Pistil hairs will start to switch from white to a light brown or amber color. Trichomes will start to become opaque on their way to milky white.

Where did the cannabis plant originate?

If you build a time machine and travel back to Neolithic China, or if you’re the first human to set foot in a hidden valley in Tibet where the original flowering cannabis plant continues to grow, you’ll experience the original plant’s effects when it was closer to begin a wild species.

When do you know if your cannabis plant is in flowering stage?

Week Five. You’ll know your plant is in the full-flower portion of the cannabis flowering stages during week five as the original buds get bigger and new buds develop along the main cola. At this stage (or at the end of week four), your plant will also start producing trichomes, so you’ll start to smell a distinct odor.

Do cannabis flowers contain cannabinoids?

They don’t contain any usable cannabinoids, so they’re pretty much just decoration. There’s plenty to learn about the biology of the cannabis flower (we’ll give you plenty of resources later on in this article), and you could probably read about it for the rest of your life.

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