How much dolomite lime with peat moss?

I mixed the following, roughly...

3 parts peat moss
1.5 parts fox farm ocean forest
1 part perlite
1 part earth worm castings
10 tbsp of age old grow powder
4 oz geohumus

I wet this mix down with dechlorinated water with a bit of FF big bloom. This mix should be a bit hot for seedlings but this is for a well rooted late veg plant.

How much dolomite lime should i add to this?

2tbl/gallon of mix or, 1cup/cf of mix.

You also need to up your perlite to 30-40% of the total mix.

Wet

One cup per cubic foot of growing medium.

I wouldn't use 30-40% perlite if your trying to feed your plants with the soil. That leaves you with only 70-60% of your original food.

I only use enough perlite to get decent drainage, 10% or less.

Fluxcap said:

One cup per cubic foot of growing medium.

I wouldn't use 30-40% perlite if your trying to feed your plants with the soil. That leaves you with only 70-60% of your original food.

I only use enough perlite to get decent drainage, 10% or less.

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I'm inclined to agree with your grow medium perlite component. Conventional decorative wholesale nurseries use 10% perlite in their potting soils (even though most use chemical nutrient feeding) to provide maximum root growth potential and incur no drainage problems.

Fluxcap said:

One cup per cubic foot of growing medium.

I wouldn't use 30-40% perlite if your trying to feed your plants with the soil. That leaves you with only 70-60% of your original food.

I only use enough perlite to get decent drainage, 10% or less.

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Agreed, unless you are growing in mud, which you are not. Right on aev, sound like things are troddin along.

like they said 10% UNLESS you're not going TLO

does everyone agree on 2tbsp per gal of mix? thanks.

madodah said:

I'm inclined to agree with your grow medium perlite component. Conventional decorative wholesale nurseries use 10% perlite in their potting soils (even though most use chemical nutrient feeding) to provide maximum root growth potential and incur no drainage problems.

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True, but for 2 things. #1, they are making the mix as cheaply as possible and use the least amount they can and #2, I doubt that they are using EWC which pretty much turns to mud when you wet them down.

Whatever, nothing is set in stone and the OP will find out soon enough if there is enough perlite in his mix after a few waterings and adjust accordingly.

Yes, 2tbl/gallon of mix for the lime.

Wet

Wetdog said:

True, but for 2 things. #1, they are making the mix as cheaply as possible and use the least amount they can and #2, I doubt that they are using EWC which pretty much turns to mud when you wet them down.

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I'm pretty good friends with a guy who owns a wholesale tree nursery. He orders potting soil in bulk and the supplier mixes his perlite requirement at the plant. To go from 10% to 20% perlite isn't a significant cost factor with truckload orders. He feels the straight potting soil (no nutrient package) with 10% perlite gives him all the drainage he needs. Everything is serviced by a drip irrigation system for water and chemical nutrient feeding purposes. No, he couldn't afford to use EWC for re-potting without pricing himself out of the market.

Whatever, nothing is set in stone and the OP will find out soon enough if there is enough perlite in his mix after a few waterings and adjust accordingly.

Yes, 2tbl/gallon of mix for the lime.

Wet

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thank you everyone for your help