Seperate VEG and BLOOM switches - Explained (2024)

Seperate VEG and BLOOM switches - Explained (1)

Terry Marszalek

A lot of people get confused when using a grow light that comes with separate "VEG" and "BLOOM" switches. Ironic that manufacturers included this option without really explaining how to use it.
Naturally you would think when your plants are in the "Vegetative Growth" stage that you would turn ON the "VEG" switch. This is correct. The confusion arises in the "Bloom" stage where without proper knowledge you would naturally turn ON the "BLOOM" switch and turn OFF the "VEG" switch. DO NOT DO THIS. Even though plants are in their bloom stage and thrive off the "RED" light emitted by the Bloom mode they still require some blue and green light to really thrive. Always have both switches ON (VEG and BLOOM) once you plants are in the Blooming stage. It will cost more in electricity but your final harvest will reward you!

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Seperate VEG and BLOOM switches - Explained (2)

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Seperate VEG and BLOOM switches - Explained (2024)

FAQs

Should I use both veg and bloom switches during veg? ›

Always have both switches ON (VEG and BLOOM) once you plants are in the Blooming stage. It will cost more in electricity but your final harvest will reward you!

When should I switch my LED lights from veg to bloom? ›

Switching from Veg to Bloom

Plants begin budding when they get at least 12 hours of 'uninterrupted' darkness each night (12/12). This must continue until harvest. Even if darkness is interrupted briefly, flowering will be hindered. In fact plants may revert back to veg unless 12 hour nights are maintained.

What is veg and bloom mode? ›

A veg-bloom switch turns off some diodes during vegetative growth and turns them back on during flowering. Instead, the G8LED lights are used to their full capacity during both phases without requiring a switch.

What is the difference between veg and bloom lights? ›

Veg switch: It's blue led and white led. For seeding or young vegetative growth,we advise using Veg switch only. Bloom switch: It's red led and white led. for flowering/blooming,we advise use both Veg and Bloom switches.

Does longer veg increase yield? ›

The longer you keep your plants in the vegetative stage, the bigger your plant will be, resulting in bigger yields from plants that were vegetated longer.

Can you have too much light in veg? ›

Telltale Signs of Too Much Light

Plants exhibit several signs when they're getting too much light. The most apparent sign is leaf burning. This typically causes the yellowing of leaves at the top of the plant but the veins stay green, and the leaves take on a yellow or brown, burnt look.

Can I switch back to veg from flower? ›

A grower can manipulate a plant and force it to revert from the flowering stage back to the vegetative stage again. This process is known as re-vegging, or regeneration, and it allows you to harvest buds from a plant, then grow the same plant again for a second harvest of buds.

How long after switching to 12 12 will I see buds? ›

When you're ready for plants to start the flowering stage, change your lights to a 12/12 cycle (12 hours with the light on and 12 hours with it off ). You will see signs of flowering in 1-3 weeks. On average plants will be ready to harvest after 8-11 weeks of flowering.

How much light should I give to my plant at 4 weeks of veg stage? ›

Vegetative

Much like a human adolescent, the plant will achieve most of its vertical growth during this time. Lasting between 3 to 16 weeks, the vegetative stage requires full-spectrum light for 18 hours and 6 hours of darkness.

How long should you flower vs veg? ›

The vegetative stage in Cannabis plants may last from 3 to 16 weeks, or even more in outdoor crops. Most growers vegetate their indoor plants for 4-8 weeks, depending on the desired plant size. Cannabis plants are usually able to start flowering from the 4th week of the vegetative stage.

How do you use veg bloom? ›

VEG+BLOOM makes pH easy. Simply dissolve the amount needed into your final volume of water and check your pH. VEG+BLOOM is blended to reduce your pH to a working range of 5.6-6.5.

Do plants need more light in veg or flower? ›

In general, plants in veg only need about half the light that they need in bloom.

When should I use the bloom light? ›

A: Bloom is meant to be used with veg light switch when your plants are big enough to handle the extra intensity of light.

Can you use the same light for veg and flowering? ›

More flexibility. Since the same light can be used for vegetative and/or flowering cycles, you can deploy your lights to best suit your needs.

Can I change the light cycle during veg? ›

Some prefer to use 20 on/4 off, which is also acceptable. However, stay away from 24 hours straight light during veg, as this does not allow any downtime for the plant, not to mention the roots grow and develop the most during the dark cycle when the rest of the plant “sleeps.”

What nutrient makes buds grow bigger? ›

The bigger the leaf area, the bigger your buds will be. Nitrogen is the nutrient needed most for this green growth. When plants reach their mature size and begin flowering, they need more phosphorus, the nutrient most essential for budding.

What is the fastest yielding vegetable? ›

The 7 Fastest Growing Vegetables You Can Grow At Home
  • 1 Cress – sowing to harvest: 5-7 days. ...
  • 2 Salad leaves – sowing to harvest: 21 days. ...
  • 3 Radishes – sowing to harvest: 25 days. ...
  • 4 Spinach – sowing to harvest: 30 days. ...
  • 5 Carrots – sowing to harvest: 50 days. ...
  • 6 Dwarf green beans – sowing to harvest: 60 days.
25 May 2020

How far away should LED lights be during veg? ›

In the vegetative stage, LED grow lights should be between 12-24 inches away from the top of the canopy. During this stage, more light is needed for photosynthesis, so the light source should be located closer to the plants.

Can you leave a grow light on 24 7 for vegetables? ›

A: In general, you should not leave grow lights on 24/7. Plants need a light-dark cycle to develop properly. It's believed that they truly do “rest” during periods of darkness, and probably use this time to move nutrients into their extremities while taking a break from growing.

Do plants need complete darkness at night? ›

Plants, shrubs and trees use sunlight for photosynthesis during the daytime, but at night they need darkness to regenerate a key compound - phytochrome. Nighttime lighting can reduce vegetation's ability to properly create this compound.

What happens if you wait too long to harvest? ›

Waiting longer to harvest gives the trichomes ample time to develop. But the longer you wait, the more highly intoxicating and sedative your flower will become. This is especially true for indica strains, but even sativa strains can become sedating.

How long does it take to re veg? ›

Fans of re-vegging often wait until they get leaves with 7-9 fingers before considering a second bloom. This may take 4-6 weeks. The technique of re-vegging does take time and it can offer the possibility of heavier second harvests but growers should be aware that there are no guarantees.

How long is flowering stage indoors? ›

When you grow indoors, flowering will begin once you switch your lights to 10-12 hours of darkness. For most cannabis strains, the flowering period will last about 7-9 weeks, although some sativas require even longer for their buds to mature.

When should I stop watering before harvest? ›

Stop Watering 1-3 Days Before Harvest – After flushing, in the final days of harvest, you can further stress your plants by stopping watering. You want to allow the plant to start to wilt just a small amount, because then the plant “thinks” it is dying and as a last-ditch effort, it will increase resin development.

Do buds get bigger week 8? ›

Week 6-8: Pistils Darken & Buds Ripen

In the next few weeks, their size will increase significantly! At week 7 of the cannabis flowering stage, your cannabis plant should still be mostly green and healthy, and it's normal for a few leaves at the bottom to start turning yellow.

Do buds grow at night? ›

12 or more hours of darkness is the biological trigger for photoperiod cannabis to bloom. Outdoors, as the nights grow longer incrementally from the summer solstice onward, some strains can even begin flowering when receiving 14 hours of sunlight.

Do bigger pots mean bigger buds? ›

Bigger pots does not mean bigger plants. The recommended pot size for transplanting is between 2 to 4 inches larger in diameter from the pot that the plant was planted in.

How often do you feed during flowering stage? ›

The nutrient requirements will change dramatically when the plants enter the flowering stage, and this may be a little hard for new growers. You can feed your plants 1-2 times every week, gradually increasing the nutrients, but at the same time pay attention to your plants' reactions after each feeding.

Is 5 week veg enough? ›

Most cultivators vegetate their plants for 4–8 weeks. After this time, a switch to 12 hours of light per day is required to initiate flowering.

How do you fatten up buds before harvesting? ›

To some degree, more light translates to fatter buds and higher yields (you'll need to pay attention to the distance between your grow light and plants or your plant may suffer from light burn). Increasing light intensity is the most effective way to fatten up buds.

How many times can you top in veg? ›

In time, these side branches can also get topped, which will create even more side branches and make the plant bush out even more. Doing this will also create more bud sites on branches and therefore increase your yields. Generally, a plant will get topped 1-3 times during its life.

Can I use veg bloom in soil? ›

VEG+BLOOM DIRTY is formulated for growing mediums like soil and peat. It contains alkalinity and Cation exchange enhancers, which makes it compatible with premixed media products like Promix, Sunshine and Light Warrior. Use with +LIFE and SHINE for optimum results.

How often can you use Bloom Booster? ›

Miracle-Gro® Water Soluble Bloom Booster® Flower Food promotes more blooms for greater color compared to unfed plants. Use our flower food with the Miracle-Gro® Garden Feeder or any watering can, and feed every 1-2 weeks.

Can you use Bloom Booster on vegetables? ›

It is specially formulated for flowering plants. Helpful? A: Miracle-Gro Bloom Booster can be used for all flowers, all vegetables, garden beds, trees, shrubs, houseplants, herbs and cacti. This product should not be used when growing plants in water, hydroponically.

What color light is best for veg stage? ›

Blue lights with a Kelvin color temperature from 5000K to 6500K or wavelength in the 400-500 nanometer range are best for the vegetative stage of the grow cycle and for starting seeds indoors.

Does wattage matter in veg? ›

Yes. Much like a human sunburn, your plants can burn or bleach if you use too much light. More wattage may mean more light output, but it also means more heat output, which can lead to burned plants.

Can plants get too much LED light? ›

The parts of the plant exposed to the excess light will show physical symptoms. You might see the leaves droop before changes in color appear. Then pale or brown spots, or yellowing leaves can occur, even as the veins remain green and looking healthy.

Should I run both veg and bloom switches? ›

Always have both switches ON (VEG and BLOOM) once you plants are in the Blooming stage. It will cost more in electricity but your final harvest will reward you!

What week should you use monster bloom? ›

Begin application when buds are forming and continue to use with every fertilizer application during the blooming cycle. Discontinue use 1−2 weeks before harvest of crops.

How far should grow light be from plant in bloom? ›

Lower wattage LEDs of around 200 watts should sit between 12-20 inches from the top of the plant. Higher wattage LEDs of 1000 watts and above should sit between 36-46 inches from the top of the plant.

How long does it take to switch from veg to flower? ›

So, as you could likely guess, there isn't much benefit to flipping the lighting schedule for an autoflowering plant: They won't take too long to make that transition themselves! Most autos enter bloom after 3–4 weeks of veg.

How long is transition from veg to flower? ›

The length of your veg cycle will ultimately determine how big your plant becomes. The flowering period is a fixed period of time, usually 8 to 9 weeks with most strains. No matter how long your plant was in a vegetative growth phase, the it will produce buds and finish flowering in 8 to 9 weeks.

Should I dim my LED grow lights for flowering? ›

When it comes to whether or not you should dim your grow lights, the answer should be “no.” Your grow lights are not like your typical household lights. Your plants depend on indoor grow lamps to be operating at 100 percent in order to get the full benefit of your bulb's light spectrum.

Can you cut off fan leaves during veg? ›

Here's what to look for when planning to remove fan leaves during veg: Leaves at the bottom of the plant that receives little light can be pruned. Fan leaves that create shadows over budding sites should be pruned to increase light penetration throughout the canopy, rather than just the tops.

Can you mix veg and bloom nutrients? ›

Absolutely. VEG+BLOOM is compatible with all hydroponic nutrient additives. Just remember to reduce the strength of VEG+BLOOM if the additives contain NPK.

Should I use full spectrum during veg? ›

The advantages to using a single, full-spectrum LED grow light for both vegetative and flowering lifecycles include: Plants don't experience shock when changing spectrums. When plants grow leaves, they optimize the leaves for the light they are currently receiving.

Can you use bloom Booster on vegetables? ›

It is specially formulated for flowering plants. Helpful? A: Miracle-Gro Bloom Booster can be used for all flowers, all vegetables, garden beds, trees, shrubs, houseplants, herbs and cacti. This product should not be used when growing plants in water, hydroponically.

How many times should I top during veg? ›

Most experienced growers top their plants early in the vegetative stage when plants are still relatively small. It's typical to top plants 1-3 times throughout the veg cycle. Again, topping can be stressful, so observe you plants for about 2-weeks between toppings to ensure they are healthy enough for further trimming.

Should I add Cal Mag to every watering? ›

Use with every watering as needed. Mix well and adjust pH accordingly. Shake well before each use. Add 1 tsp (5ml) per gallon of water, Mix well and adjust pH to 6.2-7.0 before application.

How long should I veg for best yield? ›

In optimal conditions, plants should be kept in their vegetative stage for approximately 60 days. This time period should give the plant the opportunity to maximise yield and acclimatise to growing conditions.

Do plants need darkness in veg? ›

Plants do need that period of darkness for their metabolism to work properly. They are not designed to create food non-stop, and it will do them harm in the long term to put them in this sort of situation. So, yes, plants need their darkness just as much as they need their light.

Why not use Miracle Grow on vegetables? ›

These water soluble fertilizers are heavy in salt and are harmful to soil microbes, the living, breathing organisms that have an actual job of providing nutrients to our plants.

Can you mix grow and bloom? ›

Yes and no. The FloraNova series is designed to use one part at a time, but in a time of transition it may be beneficial to mix the two at half strength each (makes a full strength nutrient solution). Use FloraNova Grow® in the vegetative stage and FloraNova Bloom® in the fruiting/flowering stage.

How often should you use Bloom booster? ›

Miracle-Gro® Water Soluble Bloom Booster® Flower Food promotes more blooms for greater color compared to unfed plants. Use our flower food with the Miracle-Gro® Garden Feeder or any watering can, and feed every 1-2 weeks.

How many times should you defoliate veg? ›

Ideally, we recommend defoliating your plants once during veg and once during flower. If you're an inexperienced grower, only defoliate once during veg. If you are more experienced, you may want to try defoliating multiple times (given your grow schedule allows enough time for plants to recover after each defoliation).

How often do you water during veg? ›

Vegetative Stage-How often to Water Cannabis

As usual, stick your finger into the soil about 1 inch and see if it is damp. If it is, don't water. If it is dry, add water. If your plant is in its forever home (a large pot), you'll likely be watering every 2-4 days.

How late can you top a plant? ›

Topping is best done when the plant is very young (less than 2-3 weeks old) and has only 2-5 nodes in total. Topping is the removal of the plants 'top' growth just above a node (fig 2). Once topped, the two axillary buds immediately below the cut will then grow out into two new branches.

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