primus seeds

18,000 – 22,000 seeds per acre or one seed every 8 – 12 inches. To achieve this singulation use a finger or air seed delivery system.

Harvest sweet corn when the end kernels of the ear feel developed. Approximately 21 – 25 days after half silk. Sample sweet corn to ensure quality.

Sweet Corn : Bi-Color : Primus.


Be sure to read the block on Managing Insects in sweet corn on the following page. Also take a look at our “Insect Scouting Resources” on page 38. Scout field every 7 days to check for insect, weed, and disease pressure. For identification of weeds, insects, and diseases consult your local extension office or view the Midwest Vegetable Production Guide.

Plant seeds 8 – 12 inches apart on 30 inch rows to achieve optimum yield. Seed depth should be ¾” – 1½” depending on soil conditions, and genetic type. Plant when soil temperature is 60º F plus. Planting in blocks will also help increase uniformity in pollination.

Sweet corn maturities are publicized as days to relative maturity. This information comes from supplier data, as well as our trial observations in the Midwest. Prolonged excessive heat or cool temperatures can cause maturity dates to fluctuate to some degree . Monitor your crop through the growing season in order to pick at optimum freshness.

SE/Synergistic types and SH2/Improved Super Sweet types should be isolated both from each other and from other types of corn including field corn, popcorn and ornamental corn.

A proven TripleSweet PLUS variety from Syngenta with approximately 15% higher sugar than Providence. Performs well under plastic and in late plantings.

For all high quality sweet corn varieties, maintaining an isolation is required to protect the high sugar and flavor characteristics of the sweet corn as cross pollination from other types of sweet corn or from different types of corn will result in starchy kernels.

An isolation can be achieved either by distance or by a difference in maturity. Preferable isolations would require 700 – 1000 feet distance from other corns, or 10 – 14 days difference in maturity between varieties.


Pre-cool cob temperature to 50ºF. After pre-cooling store at 34ºF and 95% humidity.

Growing Tips.

With good ley management, PRIMUS will give you:

The solution is PRIMUS. This mixture is a timothy, meadow fescue and white clover ley which has proven over many years to thrive in wet conditions.

Do you have a wet-lying, poorly drained field which is difficult to manage successfully? Most farms do!

Available as Organic or Conventional seed in 1 Acre (10 Kilo) bags.

The problem with such fields is that perennial ryegrasses tend not to persist in very wet soils over the winter. Within a short space of time the natural grasses return and dominate – lowering the productivity of the field.

PRIMUS is excellent for producing non-ryegrass hay, which is particularly good for horses.

HARVESTING: It is best to have a large pot of boiling water ready when harvesting – to retain the natural sugars and sweetness. These natural sugars start to change to starch a few hours after you pick corn. Strip the leaves off before boiling.

CULTURE: Apply fertilizer at 10 lbs./5 kg. of 5-10-5 per 1,000 sq ft/93 sq m., to the soil before sowing, or side dress in bands 2 in/5 cm wide and 4 in/ 10 cm deep – at least 2 in/5 cm away from the seeded row when seeding. Corn is a tough plant and will survive in many types of soil. Weather and fertilizer play a large part in the shape, and length of the cob. Checks in growth caused by cold nights in late June will shorten the cob considerably and disrupt any planting schedule. To assure a continuous supply of fresh corn throughout the season, sow every week from early May till July 1st. Early May sowings should be treated with an insecticide when ground temps. are around 50°F/10°C. Our fungicide (treatments only protect the seed from rotting – not from corn maggots. Minimum soil temp. for most early varieties is 50°F/10°C – optimum temp. is about 65°F/18°C degrees for normal germination. The use of an insecticide treatment is not needed after June 5th., when soil temps. reach normal levels and maggots are no longer a problem. Sow seed 1/2 in/13 mm deep, cover and firm. Plant at least 4 rows of each variety -side by side, 2.5 ft/76 cm apart – to assure proper wind pollination. Space seeds in groups of 4 – 8 in/20 cm apart (early varieties) and 10 in/25 cm apart (late varieties). Single rows, and group plantings of different maturing varieties cause poor looking cobs with lots of gaps in the rows, due to improper pollination. Check the soil surface for un-planted seed – it encourages birds to dig for more. Thin groups of seedlings to 2 sprouts per hill or group. Any additional fertilizer should be applied before corn is 12 in/31 cm high. Apply Sevin XLR insecticide in 5 day intervals, after corn is 18 in/46 cm high – direct spray into the axis of the leaves for corn borers. As “silks” appear, make 5 more applications of Sevin XLR in 2 or 3 day intervals for ear worm control. Organic gardeners can use BUG BAIT (attracts carnivorous insects) for corn borers and apply mineral oil to corn silks for ear worm control. Home gardeners can control bird damage by slipping small 16 in/41 cm bags over ears a week before picking. Do not remove suckers (small ears) from the bottom of the plant – it will retard maturity. For use of an insecticide treatment contact your local government control agency for advice.

FREEZING: Use slightly immature cobs with well developed kernels. Husk and de-silk. For corn on the cob – blanch 5 to 8 min; cool, drain, package in freezer bags or individually with freezer wrap. For niblet corn – blanch for 1.5 min on the cob. Chill thoroughly, strip kernels from cob and pack – then quick freeze.