Grandslam F1 is a medium-maturing cabbage hybrid variety, taking around 90 – 110 days from transplanting to harvest.
Characteristics
| TYPE | F1 hybrid fresh market cabbage (Brassica oleracea L. convar. Capitata (L.) Alef. Var. capitata (L.) Alef. |
| MATURITY | Medium (around 90 – 110 days from transplanting) |
| HEAD SIZE | Large |
| HEAD SHAPE | Round |
| HEAD WEIGHT | 4.0 – 5.5 kg (could be bigger depending on spacing) |
| HEAD COVER | Very good |
| EXTERIOR COLOUR | Blue-green |
| INTERIOR COLOUR | Yellow light green |
| FLAVOUR | Very good, sweet taste |
| PLANT SIZE | Large |
| PLANT HABIT | Semi-erect |
| BOLTING REACTION | Sensitive to bolting if produced through winter for spring harvest |
| DISEASE REACTION (SCIENTIFIC): | Intermediate resistance: Fusarium oxysporum f. sp. conglutinans (Foc) |
| FIELD HOLDING: | Excellent |
| YIELD POTENTIAL: | Excellent |
| SUGGESTED POPULATION: | 28 000 – 35 000 plants per ha |
| USE: | Sold as individual heads and per bag |
| SPECIAL FEATURES: | Excellent cold tolerance and yield potential when sown in the right slot, sweet taste |
Grandslam has become one of the market leaders, being highly favoured for winter harvest where the holding ability and excellent cold tolerance permit harvesting over a prolonged period. Grandslam is a medium-maturing hybrid, taking around 90 – 110 days from transplanting to harvest. Plants are large and vigorous with an upright growth habit. Wrapper leaves cover the heads very well. Heads are uniform, large, and very firm. Holding ability after maturity is excellent through the over-wintering season. Head shape is round and slightly flattened around the base of the plant at full maturity. Grandslam has intermediate resistance to Fusarium yellows (Foc) and is unlikely to suffer from Tip burn under conditions normally conducive to this disorder. Grandslam is used to produce large heads for individual head sales to hawkers and is also used for bagging – depending on what the market requires. This variety is known for its exceptional taste – making it a favourite amongst consumers.
Special Varietal Requirements
- Harvesting should be completed by September to avoid bolting
- Grandslam is suited to January and February sowings in the Highveld. In the South Western Cape, excellent yields can be obtained with summer sowings
- December sowings should be restricted to areas where late summer Black rot is unlikely to occur
- Contact area representative for a sowing guide – very important for this variety
