What is happening to make a case for adding fertilizer? Are some of the seeds labeled as "heavy feeders"? That and your location/climate/soil and your thoughts about compost and other organic materials might be important to possible answers.

I live in NYC and my mom lives in south jersey. My mom has to add new soil to her garden every year because the soil she Is very sandy soil. We've had a very rough winter and seems like spring doesn't want to show its face. We've been under average in temperatures. Usually by the middle of May we're ready to plant a few of our vegetables but they are substantially small and in much need for a pick me up. And to make matters worse this was the first time I started seeds for my mother and me in jiffy pellets, we quickly separated the seedlings when they sprouted but some of them just seems so leggy and malnourished.

I've just heard so many great things about those fertilizers mentioned above that I thought it would help speed up the process organically or just give the plants a boost in growth. Of these vegetable that we're planting takes a long time for harves. i was hoping for s better yield for my mother's garden this year, last year was pretty low.

I think you have a good understanding of the nutrient needs of veggie plants and should follow through with your plan. Good luck!

Thank you bcomplx, this is my first time using these different types of fertilizer and want to make sure I'm doing it right.

Completely understand Dave. Thank you! Grubby and Dave.

The first thing to start with, organic or not, is a soil test. The fertilizers you mention are fine, but they may or may not be appropriate for your particular garden. You can put on all the N you want to grow leaves, but if the garden is deficient in K not many leaves will grow. All the nutrients need to be in the right proportion. Only a soil test can tell you where you are now, so you know what products you need.