- You will get 600+ Seeds of Broccoli Waltham 29 NON-GMO Vegetable Seeds. - Broccoli Waltham 29 Vegetable Seeds. - 600+ Seeds. - Planting Depth: 1". - Distance Apart In Row: 18". - Rows Apart: 30-36". - Plant In Full Sun After Chance Of Final Frost. - Soil Type: Loam, Peat, Sand. - Sunlight: Full Sun, Medium Sun. - Cultivating Difficulty: Moderate. - Watering: Medium.