Daffodils have a primitive root system very similar to onions and garlic. Roots are going to pull up water and nutrients out of the soil and produce a healthy top growth of leaves IF there is a good balance of micro, macro and primary nutrients in soil with a decent PH level of say about 6.5.
THEN if the leaves are receiving at least 6<8 hours of strong/ direct sunshine then the leaves are actually going to convert the energy from the sun into the energy and various foods for the whole plant. Twelve hours of sunshine as the leaves mature would be great.
Full sunshine is more important than soil nutrients. Tall weeds or grasses that grow up around daffodil foliage as it matures robs the bulbs of the sun energy they need to bloom well next year.
Notice that daffodils will grow on the north sides of buildings or solid fences but they seldom bloom past the first year or two as the foliage does not receive enough direct sunshine before they mature in the Northern Hemisphere due to the low angle of the winter/early spring suns location. Same goes for daffodils planted right up against the east or west sides of a building or fence. These often bloom sporadically over the years but seldom have enough sun to multiply as they are in full shade at least half a day.
Notice where these stems were under the ground, the size of the bulbs and then the relatively short length and or reach of the roots on individual bulbs! Granular fertilizer and lime spread on top of the soil now may actually not get down through your soils to the depth where the roots can pick any of it up until next year.
You need to take a soil sample to test for PH and all of the soil nutrients from the layer of soil that is down between the area of 6″ deep to 18″ deep (15 CM<45 CM) as this is where most of your daffodil roots are going to be able to pick up soil nutrients.
Summer grasses are OK to have around and growing over the daffodils. Winter grasses like the rye’s, fescues or thick and tall winter weeds will end up shading the daffodil foliage before it produces enough food to increase bulb numbers or bulb size or even produce a bud for next year.
Winter grasses and winter weeds will be pulling up soil nutrients and most of these have more advanced root systems and can strip the upper layers of soil of all of the easily available soil nutrients before these can percolate down through the soil to a depth the bulbs can reach with their roots. Keith Kridler Mt. Pleasant, Texas