Timing Your Second Early Potato Harvest
The moment of truth for any potato grower arrives when it's time to lift the tubers. For second early potatoes, this timing is a delicate balance, aiming to capture them at their peak before they become overmature or succumb to disease. Unlike first earlies, which are harvested for their delicate, new-season flavour, and maincrop varieties, which are grown for storage, second earlies offer a middle ground – ready sooner than maincrops but with slightly more substance than first earlies.
Generally, second early potato varieties are ready for harvesting approximately 90 to 120 days after planting. This timeframe is a guideline, and the actual harvest date is influenced by several factors, including the specific variety, planting date, soil and weather conditions, and whether you are growing potatoes in pots or in the ground. The most reliable indicators are not the calendar days alone, but the visual cues presented by the potato plants themselves. Pay close attention to the foliage and the condition of the tubers.
Understanding the stage of your potato plants is paramount. When the foliage begins to yellow and die back, it signals that the plant is nearing the end of its life cycle and the tubers have reached maturity. This is a strong indicator that the harvest window is approaching. However, it is wise to lift a few sample potatoes first to check their size and skin set. This preliminary check ensures you are not harvesting too early, which would result in small, underdeveloped tubers, nor too late, risking potential spoilage or disease.
- Second early potatoes typically mature 90-120 days after planting.
- Observe plant foliage for signs of yellowing and dieback.
- Sample a few tubers to check size and skin development.
- Weather and soil conditions significantly impact harvest timing.
Factors Influencing Harvest Timing
The specific time you plant your seed potatoes can shift the harvest window. Planting earlier in the spring, as soon as conditions allow, means your second earlies will be ready sooner. Conversely, planting later will naturally push the harvest date back. It is not just about the calendar date of planting, but also the soil temperature and prevailing weather conditions at that time. Warmer soils encourage faster growth.
Weather plays a significant role throughout the growing season. A cool, wet spring might delay initial growth, while a hot, dry summer can accelerate maturity but may also cause stress to the plants, leading to premature dieback. If a prolonged dry spell occurs, watering your potato plants will help them maintain vigour and develop tubers properly. Conversely, waterlogged soil can lead to tuber rot, so ensuring good drainage is vital, especially if you are growing potatoes in pots or containers.
The variety of second early potato you have chosen also dictates its maturity period. Some second earlies are bred to be on the quicker side of the 90-120 day spectrum, while others might take closer to the full 120 days. Always check the specific variety's information, often provided by the seed potato supplier. Mixing varieties with different maturity rates can also mean you are harvesting from the same patch over a slightly longer period.
Considering Different Growing Methods
Your method of cultivation can subtly influence when you harvest. If you are growing potatoes in pots or growing bags for potatoes, the soil can warm up faster than in the open ground, potentially leading to slightly earlier growth and maturity. However, these containers can also dry out more quickly, requiring careful monitoring of watering. If the plants show signs of stress from dryness, their foliage might die back prematurely, giving a false signal of maturity.
For those who practice 'earthing up' consistently, you have more control over accessing tubers without fully disturbing the plant. This technique involves drawing soil up around the stem as the plant grows, encouraging more tubers to form along the buried stem and protecting developing potatoes from light, which causes them to turn green and inedible. This process can allow for staggered harvesting of larger tubers, leaving smaller ones to continue growing.
The true harvest readiness is a combination of plant signals and tuber development, not just a date on the calendar.
Ultimately, the most successful approach is to observe your plants and sample your crop. Relying solely on planting dates or general maturity windows can lead to disappointment. A few minutes spent gently inspecting the soil around your plants will confirm what is happening beneath the surface, ensuring you harvest your second early potatoes at their absolute best.
Harvesting Techniques for Second Earlies
Once you have determined that your second early potatoes are ready, the harvesting process itself requires a degree of care to ensure the best results and to prepare them for storage or immediate use. The ideal time to lift them is on a dry, settled day. This condition is crucial as it allows the potatoes to dry thoroughly, which helps to toughen their skins and reduces the risk of rot during storage.
Begin by carefully cutting down the foliage with secateurs or a sharp spade, leaving a few inches of stem attached to the plant. This reduces the amount of green material you have to deal with when digging and minimises the chance of damaging the tubers with your tools. Then, using a garden fork, carefully plunge it into the soil a good distance away from the main stem of the plant to avoid piercing the potatoes. Gently lever the soil upwards to expose the tubers.
Work systematically, turning over the soil to locate all the potatoes. It is advisable to have a container or sack ready to place the harvested potatoes into as you find them. This prevents them from rolling away and makes the process more efficient. After initial digging, you can often find remaining tubers by gently turning the soil over with your hands, especially if the soil is loose and crumbly.
Post-Harvest Handling and Storage
Once lifted, do not immediately wash your potatoes. Instead, allow them to dry on the soil surface for a few hours on a dry day, or on racks or trays indoors if the weather is damp. This drying period is essential for developing a good skin set and allowing any superficial soil to be brushed off. Handle them gently to avoid bruising, as any damage can compromise their storage life.
For short-term storage, you can simply place them in a cool, dark, and well-ventilated place. Avoid storing them in plastic bags, which trap moisture. Hessian sacks, crates, or shallow boxes are ideal. Ensure they are kept away from light, as exposure can cause them to turn green and develop solanine, making them unsuitable for consumption. If you intend to store them for longer periods, curing them in a slightly warmer, humid environment for a week or two before moving to cooler storage can further enhance their longevity.
If you harvested your second earlies for immediate consumption, you can wash them just before use. The skin is often tender enough to be eaten, providing valuable nutrients. Unlike maincrop varieties which are primarily grown for long-term storage, second earlies are best enjoyed relatively soon after harvesting for their fresh, delicate flavour. Prolonged storage beyond a few months for this type of potato is generally not recommended.