How to Keep Diseases, Mould, and Pests out of Your Grow Room

5 handy tips to keep diseases, mould, and pests out of your grow room

You think your cannabis plants would be safe when grown indoors. But no! Even in a secure grow room, cannabis plants can still be susceptible to diseases, fungi and pests. There are a few basic things you can do to minimise the chances of this though. Read on.


Tip 1. Buy strains that are most likely to resist disease and mould

Northern Lights mould-resistant cannabis

Northern Lights – a resistant strain

Due to all these years of selective inter-breeding, there are now a good few strains which have been bred to be particularly resistant to mould or disease. You can get yourself off to a good start by getting seeds of these hardy resistant strains. Northern Lights is always a favourite in this regard.

Click here to browse a good selection: Mould-resistant Seeds (


Tip 2. Use clean potting soil

Obviously, re-using the soil from a previous grow will save you money and hey, it’s recycling, right? However, soil that’s been used will have lost some of its nutrients (they’re in the previous plants you grew). Not only is this not great for your new plants, it also makes the soil more likely to hold diseases and pests.

Give your new plants the best start in life. Nourish them well. It’s cost-effective in the long-run.


Tip 3. Don’t use mulch (or anything else) around the base of your plants

While on the subject of soil, keep your top soil clean. This way, there’s nowhere for bugs and fungi to hide. Pick out dead leaves before they decay and don’t put on any mulch of any kind. Although some argue that using mulch can insulate the soil, it’s more likely to provide a perfect home for insects and mould.

You might get away with using mulch that’s completely organic, but if you do go for that, keep a close eye on what lies beneath….

white widow

White Widow – a classic indoor strain


Tip 4: Give your plants plenty of fresh air

You need to maintain a proper circulation of air in your grow room. Get a good vent fan to remove moist air.

Firstly, a well-ventilated room will be less humid and since mould loves humidity, a drier room is less likely to become mould-infested.

Secondly, the flow of air around your plants will physically stop moulds and bugs actually attaching to your plants. Both insects and mould spores will find it harder to settle on your lovely plants if there’s a bit of a breeze. You can literally blow them away.


Tip 5: Clean everything

Obviously you need to keep everything in the grow room clean to prevent disease, including your tools, to make sure they’re not contaminated with diseases or moulds from other plants. You can dip your tools in rubbing alcohol or just scrub them carefully with hot water and detergent.

You need to keep yourself clean too. This might sound a bit over-zealous, but you’d be surprised how much dodgy stuff you could be carrying on your skin or clothes. Wear clean clothes that haven’t recently been outside to enter your grow room. And wash your hands thoroughly before touching your plants. OCD is your friend here…

If you take these basic precautions to keep diseases, moulds, and pests out of your grow room, the chances are you’ll get a nice healthy crop – free from diseases, fungi and insect predations!


What are you waiting for? Get started with the best quality seeds

Not sure which seeds to go for? Browse our selection (on our sister site) of the best indoor seeds:
Top Ten Indoor Cannabis Strains


These tips are based on advice from – the UK’s top cannabis seed seller.

Buying a Grow Room, Grow Cabinet, Grow Box, or Grow Tent

Thinking of buying a grow room, grow cabinet, grow box or grow tent? There are plenty of ready-made grow rooms, cabinets, boxes and tents of all sorts and sizes available online. So which is the best one for what you need?

If you already know exactly what you want, then here are links to one of the main reputable sellers of high-quality grow rooms, cabinets and tents to get you started. Just click to go to the online store and find what you’re after: (ships worldwide)



When buying a grow room, grow cabinet or grow box, which are the best?

Obviously, some suppliers are better than others. The company listed above – Superclosets – has a proven track record of providing quality products at reasonable prices. So you’ll be fine for buying a grow room, grow cabinet or grow box or tent.

If you’re not sure what kind of grow room, grow cabinet, grow box or grow tent you need, then that’s a different question.

One easy way to find out is to use the “guided shopping” tool. It gives you simple choices to make, one step at a time, so that gradually you whittle down your options to find the product most suitable for your needs. Click here to use it:

Supercloset guided shopping tool


Buying a grow room?

Superclosest grow rooms etc - special offerSupercloset is the world’s best seller of grow rooms, cabinets and boxes. So you could say that their products are tried and tested!

Supercloset stocks a wide range of grow boxes, cabinets and rooms – of all sizes and suitable for all spaces, from a few feet high and wide to 9 feet x 9 feet. Different kinds of lighting are also available (LED, HPS and CFL) and you can get them for use with or without soil.

SuperCloset is renowned for its award-winning designs, particularly for its SuperPonics watering system (“SuperPonics is the fusion of Deep Water Culture, Aeroponic, and Top Feed all in a single system [and] perfectly balances the amount of water your plants need and provides much-needed oxygen to the roots at all times.”) and also its full-spectrum Kind LED lights. Supercloset products are industry-leading in many aspects actually – airflow circulation, netting, carbon filtration…

To give an example of why their products are so popular, here’s a screenshot from their homepage with details of exactly why their grow rooms are so good:

You can also click here to read more about special Supercloset grow room features.

Supercloset has an exceptional business reputation, being accredited by the Better Business Bureau and having a perfect A+ rating (better than any other hydroponics companies).

Supercloset products come ready-to-use. All their grow rooms, cabinets and boxes arrive almost completely assembled. You basically just have to fill the reservoir and plug it in. And that’s it. Off you grow!

All Supercloset products come with a three-year warranty and lifetime customer and technical support.

  • sells grow boxes, cabinets, tents and grow rooms, plus other hydroponic supplies
  • ships worldwide (distribution centres in US and UK)
  • 3 year warranty on all products
  • plus lifetime customer and technical support
  • grow tents (shells) from $231
  • grow boxes and cabinets from $725
  • grow rooms from $999


What about the prices of buying a grow room, cabinet, box or tent?

Grow rooms, wherever you get them, are not cheap. And even for a good-sized cabinet or box you’re going to need a few hundred bucks. Tents are the cheapest though require more work on your part in maintaining your crop.

What about shipping when buying a grow room?

Supercloset is an American company but ships worldwide, with a distribution centre in the UK as well as the US, meaning that shipping within Europe is cheaper since most products are not having to come all the way from the States.


Happy shopping and most of all – happy growing 🙂