Fertilizer Timing and Type (Mustard Greens)
At Planting: Mix in a balanced organic fertilizer (10-10-10 or similar).
During Growth: Side-dress with compost or a nitrogen-rich fertilizer every 3–4 weeks.
Container Plants: Feed with liquid fertilizer every 10–14 days since nutrients leach quickly.
https://harvesttotable.com/feeding-mustard-greens-fertilizer-tips-for-fast-growth/
Diana here: Nitrogen is the FIRST number on the NPK scale (10-10-10) so make sure that first number is higher for the fertilizer you’re using on your Mustard Greens...once they’re UP. You’re wasting product to fertilize before germination. :)
The tomatoes and squash can use the same general fertilizer, but you want THAT NPK number to be higher in the MIDDLE for blooming and setting fruit. Also make sure both get calcium, since you’re growing in pots and nutrients leach out quickly. Calcium (liquid bone meal) will help prevent Blossom End Rot in both plants.
Thank you Diana. This is all very good advice!
I thought I was doing something wrong, with the Mustard Greens. Turns out, the greens have different nutritional needs than my other 2 plantings.