Growing Cannabis Outdoors

Apr 9, 2025 | Growing Cannabis

by | Apr 9, 2025 | Growing Cannabis

Growing Cannabis Outdoors

Gold rush outdoor grown outdoors

Gold Rush Outdoor Grown Outdoors.

Growing cannabis outdoors is a chance for you to grow from seed to harvest over 6 months. Outdoor cannabis plants have the potential to become huge yielders. However, many variables can affect how successful you may be when growing cannabis outdoors.

In this article, we provide a guide on how to grow the ultimate outdoor cannabis. We explain what you will need for an outdoor cannabis grow, nutrient and watering schedules for outdoor cannabis, the best-growing medium to use, when to plant and harvest a cannabis garden, our tip tips to follow, and the signs of good and bad outdoor cannabis gardens!

Which Growing Medium Is Best for Growing Cannabis Outdoors?

Photo 2 - buying bags of soil will be the easiest option when growing cannabis outdoors

Photo 2 – Buying Bags Of Soil Will Be The Easiest Option When Growing Cannabis Outdoors

Several factors should be considered when deciding what growing medium to use for growing cannabis outdoors. Make sure your outdoor-grown plants have the right growing medium with plenty of nutrients, good aeration, drainage, and the ability to hold water. Below is a list of your options for an outdoor cannabis grow.

Store-bought soil: Ready to plant and packed with nutrients and microorganisms
Compost: Easy to work with, full of mycorrhizal fungi, and slow-release magnesium.
Peat moss: An organic growing medium that can hold lots of water with an acidic pH.
Coco coir – A very airy and soft inert growing medium containing no nutrients.

What Do You Need to Grow Cannabis Outdoors?

Suppose you are wondering how to grow cannabis outdoors. In that case, you must know everything to produce the ultimate outdoor cannabis garden. Below is a breakdown of everything you will need to get your outdoor cannabis grow started.

Growing Medium 

The growing medium is the medium into which your seeds will be planted. Whatever pots you decide to use will be filled with the growing medium. This can be soil, compost, peat moss, or coco coir and should contain perlite or vermiculite to improve aeration and drainage. Some outdoor cannabis grows may contain a mixture of all of these mediums to achieve the ideal mix for growing outdoor cannabis.

Cannabis Seeds 

Your cannabis will need to be germinated and then planted into the growing medium. Cannabis seeds are available to buy as regular sex or feminized, and either photoperiod or auto-flowering.

Water source 

Watering your outdoor cannabis garden will be a major part of the grow. It allows plants to access water to transpire through their leaves and keeps the roots saturated and able to absorb the available nutrients.

Organic nutrients 

Organic nutrients come in all types, from liquid nutrients sold by nutrient companies to hard foods such as worm castings and compost.

Pots for planting 

When deciding what pots to use, some outdoor cannabis growers will use plastic, whilst others may choose fabric pots that allow the roots to prune themselves.

Sunny location 

Outdoor cannabis plants love sunshine; the more they get, the bigger and better they will grow! Find a location in your garden that provides direct sunlight from sunrise until sunset.

Water and Nutrients for Growing Cannabis Outdoors

Photo 3 - this grower waters his plants on a daily basis.

Photo 3 – This Grower Waters His Plants On A Daily Basis.

Your water source may be the tap, garden hose, or bottled water. As far as nutrients are concerned, for outdoor cannabis, it is best to use a 3- or 5-part liquid bottle range from a well-known cannabis brand.

Growing Cannabis Outdoors – The Right Time To Plant and Harvest

Photo 4 - when growing cannabis outdoors, seedlings should be kept in a sunny location and planted in the spring.

Photo 4 – When Growing Cannabis Outdoors, Seedlings Should Be Kept In A Sunny Location And Planted In The Spring.

  • Cannabis seeds should be germinated and planted between April and May.
  • Outdoor cannabis plants will grow in a vegetative state from May until mid-July.
  • An outdoor cannabis garden will begin to flower from mid-July to early August.
  • Outdoor-grown cannabis will be ready to harvest between September and November.

Spliff’ Seeds’ Top Tips for Growing Cannabis Outdoors

Tip #1: Picking the right outdoor cannabis strain for your climate.

Picking the right strain that is practical for your climate will significantly affect harvest time. Growers in Northern Europe, for example, should choose a fast-flowering strain that can be harvested around September. Outdoor cannabis grown in Southern Spain has much more flexibility with long-flowering strains.

Tip #2: Keep your outdoor cannabis plants well-watered

Watering your outdoor cannabis garden frequently will encourage the plants to grow with optimal health and vigour. Water them at the same time each day, and avoid watering them during the hottest points between 12 p.m. and 4 p.m.

Tip #3: Only harvest when the plants are ready

Harvesting outdoor-grown cannabis plants too early or too late can have a significant effect on the quality of your cannabis crop. Plants harvested too early will result in a low yield and potency, whilst plants left for too long can cause the cannabinoid profiles to change, causing a more potent and sedative effect.

Spliff Seeds’ Best Strains for Growing Cannabis Outdoors

If you are not quite sure which strain or strains are best for growing Cannabis Outdoors, below is a latest list of the top 5 Spliff Seed Outdoor strains.

  1. Gelato
  2. Bubblegun
  3. Moon Walker Kush
  4. Power Plant
  5. Snow White

Spliff Seeds’ Best Auto-Flowering Strains for Growing Cannabis Outdoors

If you like the idea of your outdoor cannabis garden having auto-flowering genetics inside, then below is the latest list of Spliff Seeds’ best 5 auto-flowering strains for growing cannabis outdoors.

  1. Blue Dream Automatic
  2. Gelato Automatic
  3. Gorilla Automatic
  4. Mint Runtz Automatic
  5. Nevilles Haze Automatic

Growing Cannabis Outdoors – Signs of Good Quality

A huge dutch automatic plant grown outdoors

A Huge Dutch Automatic Plant Grown Outdoors

When it comes to knowing if you have grown top-quality outdoor-grown cannabis, there will be many visual signs to look out for. Below is a list of the indicators to let you know your outdoor cannabis ticks all the boxes as far as quality is concerned and will be a delicious smoke.

Fat and chunky buds 

Harvesting big, chunky and hard-to-squeeze buds with a high level of density is one sign of well-grown outdoor cannabis. If your outdoor cannabis garden is full of top-heavy colas, then you have done well!

A great terpene profile 

How aromatic and rich in terpenes your outdoor cannabis crop is will also let you know the trichomes are packed full of essential oils and terpenes, resulting in great-tasting outdoor cannabis.

Uniform buds 

Outdoor-grown cannabis plants should have a uniform structure and be full of big buds from top to bottom. Aim for an outdoor cannabis garden that is not full of plants with small, undeveloped popcorn-sized buds from the centre point of the plants down.

Resinous leaves 

Outdoor growers aim to produce plants covered in resin, which means that your outdoor cannabis plants have a large amount of resin on the buds and leaves.

No mould or insect damage 

If you have done a good job of protecting your outdoor cannabis plants from insects such as spider mites and caterpillars, then immaculately looking buds with no signs of insect damage or mould are a great indicator of quality.

Growing Cannabis Outdoors – Signs of Bad Quality

Photo 6 - an unhealthy cannabis plant with signs of insect damage

Photo 6 – An Unhealthy Cannabis Plant With Signs Of Insect Damage

When growing cannabis outdoors, there are times when your outdoor weed plants have not grown as well as they could have. There are many reasons this can happen when growing, and below is a list of signs to look out for.

Undeveloped buds 

There are several reasons why an outdoor cannabis garden can produce low yields. Outdoor cannabis plants, when harvested with small buds without much density, are a clear sign of a poor-quality crop.

.
Airy bud structure 

If you find your buds, once dry, have an airy and light structure to them, then your outdoor cannabis garden does not get enough sun or nutrients.

Signs of mold

Mould is a pathogen that attacks outdoor cannabis and causes the buds to become soft, like candy floss. When growing outdoor cannabis, keeping the temperature and humidity levels within a safe zone will prevent outdoor cannabis buds from becoming mouldy and contaminated.

Minimal aroma

In the event your outdoor cannabis garden has minimal aroma and smell, then this is a sign that your outdoor cannabis crop suffered from heat stress, insect damage or did not receive enough sunlight.

Our Conclusion for Growing Cannabis Outdoors

When growing cannabis outdoors, as long as you start with great genetics, you should produce top-notch outdoor cannabis plants. The best methods for successfully growing cannabis outdoors are to work with organic nutrients and soil, water and feed at the correct times, keep your outdoor cannabis grow in a sunny location, and check on them daily.

Not only will your outdoor cannabis plants be healthy, robust and full of resin and terpenes, but the smoking experience and effect will also be as good as the buds you find in a coffee shop or social club! Best of luck growing cannabis outdoors this year, and do as much research as you can on how to grow cannabis to take your outdoor cannabis grow game to the next level!

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