One of the best things for household stains is white vinegar, and the same can be said for how it targets stubborn garden dirt. This eco-friendly solution is made up of equal parts vinegar and water, which is then left to soak into the patio to correct any discolouration and also remove tough marks.
The patio black spots that grow on your garden stonework are actually spots of black lichen. The spores from the black lichen start life as tiny dust-like spores growing on the underside of leaves on trees and plants. These spores are carried, by the wind and the rain, onto your stonework in their millions.
If you have greenish-black stuff on your concrete patio, it's probably mold, mildew, or moss. Damp or moist conditions from rain or humidity can encourage mold and mildew to grow in those nooks and cracks of concrete pavers or bricks.
Vinegar or baking soda: These natural cleaners work well to clean cement patios with stubborn charcoal or rust spots. Mix equal parts vinegar and water, scrub the patio with the mixture, then give it a good rinse. If stains don't dissolve, try undiluted vinegar.
Use a detergent such as Dawn or Ajax dishwashing liquid mixed with water to brighten a concrete patio that hasn't been cleaned in a while. Just as you would regularly vacuum the floor and dust your furniture inside your house, you should keep your patio clean so it's ready at a moment's notice to entertain.
Combine 1 teaspoon of hydrogen peroxide and 1 teaspoon of milk in a glass bowl. Dip cotton pad or Q-tip in the bowl and apply to dark spots. Leave on for 15 minutes. Rinse with lukewarm water and finish off with your favorite serum and moisturizer.
@Gettingonabitnow black spots are usually lichen so patio magic, although great, won't shift them.
Remove those ugly green and black mold stains on your deck with Wet & Forget Xtreme Reach™ Hose End. Spray your wood or composite deck with Wet & Forget no-rinse cleaner. Allow the surface to dry (4-5 hours). Let Mother Nature do the rest of the work for you!
Lichen are white, brown, yellow and black (i.e. "black spot") biological growths that live on slate and concrete tiled roofs, as well as on concrete paths, monoblock drives, brickwork, and occasionally on wall render. Lichen can be very tough to remove and pressure washing alone is ineffective.
Cleaning your patio with bleach provides a little extra “oomph” over soapy water. Bleach gets into all the dirty cracks and helps to improve the appearance of your patio slabs dramatically. It can help you get rid of moss, algae and weeds. Cleaning a patio with bleach is easy once you know how, but it can be dangerous.
Black Spot Remover contains some 'hypo' itself (less than 5%) but it performs better than neat 14 - 15% Hypo. It contains activators and wetting agents which stabilise and accelerate the performance, making it much safer to use and it won't crytalise when dry.
In fact, vinegar removes mold from concrete better than bleach. Bleach will only remove the top layer of mold, causing the mold to return.
'A homemade cleaning solution for your patio can be made by mixing equal parts water and white vinegar,' says Zak. 'This natural cleaner is effective in removing dirt, mildew, and algae. For stubborn stains, you can add a few drops of liquid dish soap to the mixture. '
To clean smaller surfaces areas, pH-neutral soap, a little water, and a brush are suitable. If you want to clean larger areas of natural stone efficiently, you can reach for the electric patio cleaner or work with the pressure washer and a surface cleaner.
Dark spots from acne benefit the most from using Salicylic Acid. It gently exfoliates the upper layers of dead skin and speeds up the formation of new skin cells. This reduces the appearance of dark spots. Salicylic Acid is the best treatment for dark spots on the face.
Bio-Shield® is Proven Effective
It can be used to clean any exterior surface. For the correct application of these exterior cleaners, it is important the surface being treated is saturated and kept wet until the moss, mould and lichens are dead - in as little as 15 to 20 minutes using Bio-Shield®.
Mix a half and half solution of vinegar and warm water and pour it onto your stained patio. Leave it to get to work for around an hour, then use a stiff brush to remove the dislodged dirt from the slabs. Rinse with a garden hose or bucket of water and buff with a garden brush.
How to Use Pro-Kleen Black Spot Remover. Apply the solution neat using a pump sprayer or a watering can. Leave for a minimum of 2 hours or overnight if possible. Keep children and pets away from the area during this time.
Because hydrogen peroxide has very strong bleaching properties, it can lighten dark skin areas such as dark spots caused by sun damage, aging, scars or hormonal changes. However, this process will irritate and destroy the user's skin a lot.
Chemical control
The fungicides tebuconazole (Provanto Fungus Fighter Concentrate), tebuconazole with trifloxystrobin (Provanto Fungus Fighter Plus, Toprose Fungus Control & Protect), and triticonazole (Fungus Clear Ultra) are labelled for the control of rose black spot.
While researching how to remove patio black spots you may have come across “Sodium Hypochlorite” which is a very strong bleach and while it may remove black spots, it will also damage the surface of anything it comes into contact with.