How to Grow Potatoes (Maincrop)

How to Grow Potatoes (Maincrop)

Potatoes are one of the easiest vegetables to grow and are a perfect introduction for the novice gardener. Potato varieties are categorised according to the time they take to reach maturity, these are called First Earlies ( 90 days),  Second Earlies (110 days  ) and Maincrop ( 135 days ). Maincrop potatoes are generally ready for harvest during early to late autumn.


Chitting is the way of encouraging new shoots to grow on the seed  potao to give it a head start at the beginning of the growing season. Set your seed potatoes, with the  rounded end pointing upwards, in a light,dry space and leave them for a few weeks to sprout. Seed trays or old egg cartons  are ideal for this.They are ready for planting when the new shoots are about 2cm long.


  • Around late April, choose a sunny, sheltered site with protection from late frosts and gales.
  • Prepare trenches along the bed about 12cm deep and add fertlizer or manure.
  • Place the seed potatoes in rows, with the shoots pointing upwards, and cover lighlty with soil taking care not to damage the shoots.
  • Maincrop potatoes should be planted 40cm apart in rows 75cm apart.

Crop Care

As new shoots appear earth up each plant by covering it with a ridge of soil so that the shoots are just about buried.  Do this at regular intervals until the plant has a mound of earth about 15cm supporting it. This will encourage new shoots below the surface and protect the growing tubers from


Check for any yellowing leaves or damage to the plant and cut out the affected parts. Blight is a problem for potato growers usually during warm, humid spells. Provide adequate ventilation and remove and burn the plant if suspected. Check for slugs and insects as the tubers grow, dig around the base of the plant and remove any intruders.


Maincrop potatoes will produce a larger yield of bigger spuds and can remain in the ground until Winter. Harvest when the plant begins to die off by cutting back the stem and foliage, the tubers can be left in the ground until you need them. Lift them gently with a hand fork.