I am new to vegetable gardening. I prepared soil for container gardening and I think i messed it up. I mixed two parts of miracle gro, one part of sphagnum peat moss and one part of cow manure compost. I am planting cucumber and tomatoes in it. The containers are self watering 5 gallon buckets. Any view points for my soil recipe would be really appreciated

For containers, I'd have gone with a straight potting mix.

If you're using garden soil, then you may have compaction issues, even with the added peat, since you didn't add perlite or vermiculite for drainage

Do please keep in mind that your plants will need to be fed regularly because there is no soil food web in the bucket to digest the composted manure as there would be in the ground. So minimal nutrients from the manure compost will be available to the plants. Plus what nutrients there are will quickly drain out of the container with watering.

Next time just use the MG or similar potting mix. It already contains the peat and has been pH balanced with lime. By adding more peat to the mix you will have made it more acidic and that too can interfere with nutrient uptake.

Good luck with your plants.

Dave

You'll do more damage than good by trying to remove and replant them. You are boxed in to using liquid nutrient sources but that is fine.

You can always buy some garden lime and mix a very small amount in water, let it sit for a few hours and them water the soil with the water. But it really isn't necessary as long as you feed them. They are small because the container lacks nutrients.

If you want strictly organics then there are any number of liquid organic fertilizers available on the market to use - fish emulsions and/or fish and kep blends mixed into water - sold at any of the big box stores or nurseries and discussed here in infinite detail.

Or you can use Miracle Grow diluted to 1/2 strength and feed every 7-10 days.

Dave