Well, there's a lot I don't understand from your post, but that's ok, I think it's just cultural. :) What's a three-way mix, what's seasol, and what do you have planted, and which of the many Victoria's in the world do you inhabit? There are so many reasons why you might not be getting satisfaction, but I bet they can be figred out once we get past the terminology! Cheers!

Yes. What are you planting and trying to grow ? From seed, from transplant ?

I know )Three Way" is a name for garden soul sold by some nurseries. Probably it is made of: Topsoil, Compost and sand.

It happens sometimes that those mixture might have herbicide or other chemicals that inhibit plant growth. Just a possibility.
Also, the first year that kind of soil can be bare with little or no nutrient and maybe lacking some trace elements (just another possibility) And how about the pH ?

So I would recommend a soil test.

What veggies are we talking about?

What part of Victoria are you in? I'm guessing your days are quite short by now, if you're far south.

Thanks for writing back to me. I live in Melbourne, Victoria, Australia, It's autumn now but the weather is still hovering at 20 degrees so it's still quite warm. All my plants were started from seed. The plants that have sprouted are Bok Choy, Endive, watermelon radish, beetroot, onions (red, brown & white) spring onions and broccoli (barely). My leek just won't sprout and something is eating my carrot every time it pops up. Our three way is soil is actually a 5 way mix - it consists of two soil types and 3 kinds of manure, it is the best garden mix you can buy for your veggie patch. Seasol is a garden fertiliser made from seaweed, instructions are to add to your patch every two weeks
I grew a very successful garden last year which was very inspiring being a new gardener. Everything grew beautifully and we had fresh veggies well into the start of autumn... I haven't done anything different this season, I have prepared the garden the same as I had done at the start of spring. I checked the PH levels about a month ago and it's was ok but I will pop out now and double check
I hope I have answered your questions and clarified everything! THANK YOU

We have a temperate climate