Alright, last year we started seeds in a ½ sand and ½ peat mixture. I was not a fan of this because those little plants had nothing at all to eat after they sprouted so it was important to get them moved up to the next pot asap. Not to mention the formula was heavy and itchy. We then transplanted the little seeds into a regular potting soil and watered with fish emulsion every week.
This year, after receiving a question about planting mix from a friend, I think it is time we did a little research on making our own seedling and potting mixes. A quick google search turned up THOUSANDS of recipes and it quickly became VERY complicated indeed.
So I delve in and get up to my ears in info about bone meal and lime, blue sand, chicken manure and worm castings….. ugh. Perhaps I start slow on this project. I found a pretty good recipe that uses pre-made compost and fertilizer. I can get into making my own fertilizer another day. Chemist I am not.
For starting seeds there is no sense in wasting a bunch of time since they just need some kind of light, water holding, air breathing, mix.
I found this:
1 part potting soil mix
1 part vermiculite
I think I will add in
½ sand
½ peat
yeah, no real reason, just for kicks and to make that potting soil go further.
I found this recipe for growing seedlings.
• 6 parts compost -
• 3 parts soil
• 1-2 parts sand-
• 1-2 parts aged manure
• 1 part peat moss, pre-wet and sifted-
• 1-2 parts leaf mold, if available
• 1 6" pot bone meal
I am going to make these adjustments:
• 6 part compost
• 3 parts soil -
o I am going to purchase top soil so I do not have to bake it cause really? I am also going to add the seedling mix to the “soil” after each seedling moves to it’s new home in potting soil.
• 1 part sand (cause the seeding mix will have sand)
• 1 part peat
• 2 parts manure
o chicken manure purchased cause mine is not aged long enough yet
• pre-made organic fertilizer as directed on packaging
I need to get a cost comparison going – our “new and improved” soil vs just plain ol’ organic potting soil which did work fine last year and did not require mixing…
Frankly this just might be a math problem that is over my head – all this “parts” business and the fact that all of this stuff is sold in cubic feet argh.
To break it in to nice round numbers for calculations I am going to make the following assumptions
1part=1 cubic foot – even though that would be too much potting soil for this operation at least I can figure out costs easily…. Right?
Using that figure each recipe here would make 13 cubic feet of “soil”
Organic Potting soil costs about $5.50 per cubic foot that would be a total of $71.50 spent on dirt. This leads me to believe I would use this much cause last year I SWEAR we spent hundreds on dirt but who knows. My memory is not the best.
So here is my costing as recorded on my little scrap of paper while in Lowes yesterday
• 6 part compost = $5.34
o organic compost bought in bulk
• 3 parts soil = 11.94
• 1 part sand = $2.00 (this is a guess I forgot to check)
• 1 part peat =$2.89
• 2 parts manure = 7.44
• pre-made organic fertilizer as directed on packaging – yeah not sure would have to check this better
Wow – I am fairly surprised that I total only $29.61 so far…. That IS a savings, I had assumed I would break even at best.