How do you fertilize sweet peas?

Sweet peas are heavy feeders, so amend soil well before planting with lots of rich compost or well-rotted manure. During the growing season, fertilize at least twice with a good soil drench of tablespoon each of fish emulsion and liquid kelp per gallon of water.Click to see full answer. Keeping this in view, what is the best fertilizer for sweet peas?If you use plenty of aged manure and compost when planting, you do not need to fertilize. If you do want to add nourishment, use high potash feeds, as nitrogen feeds encourage too much top growth. Sweet peas prefer cool days and nights and will start to fade when temperatures go above 65°F.Additionally, what to do with sweet peas when finished flowering? Cutting back. Cut perennial Lathyrus back to ground level in autumn or, preferably, leave the cutting back until February so the dead stems provide cover for wildlife in winter. Simply pull out and compost annual sweet peas once flowering has finished at the end of summer. In hot, dry seasons this might be a bit sooner People also ask, what do you feed sweet peas? If you garden on poor soil, feed your sweet pea plants with a general fertilizer every couple of weeks, or sprinkle on comfrey pellets. A potash-rich tomato feed is ideal. I don’t feed mine, gardening on a rich, heavy, clay soil.How often do you water sweet peas?Sweet peas rarely need watering more than once a week, but you need to maintain even moisture throughout the growing season. They do not like hot weather, so water them regularly in the summer, but do it early in the day to prevent buds from dropping, yielding and fewer flowers, and to prevent plants from scorching.

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