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Why don’t potatoes come up?

Potato plantation If the weather is warm, and the soil has warmed up under the rays of the sun up to 8-10 C °, the first shoots of potatoes appear on the plantation in about 10-12 days. However, in protracted springs, when May suffers from a lack of sunny days, and the atmospheric thermometer does not rise above + 20 … +22 C °, the sprouts need a little more time to break through the layer of earth and please the summer resident with their height. Under such conditions, they appear on the surface not earlier than after 20-25 days..

Be sure to ask experienced gardeners or agricultural specialists how many days potatoes emerge after planting directly in the climatic zone where you live and plant the prepared tubers. For example, for the southern regions, the onset of phase 1 (emergence of seedlings) after 20 days is in most cases a deviation from the norm, but for the northern regions this period is quite acceptable.

But, unfortunately, it also happens that all the deadlines pass, and there are still no green rows in the garden. Anxiety and related questions involuntarily arise. Why don’t potatoes come up? What prevents him from gaining the strength of growth? What to do: wait for shoots or plant again?

The reasons why potato shoots do not appear

1. Weather conditions

Planting potatoes The planted tubers, as well as the developed plants, are “afraid” of the vagaries of nature. The following phenomena pose the greatest threat to planting material:

  • Frost. With a sharp drop in temperature, tuber tissues die off. Buds and matured shoots also get cold burns: without a “pantry of nutrients” they quickly die or drastically slow down growth (with partial damage).
  • Increased soil moisture. Abundant precipitation during the first phase of the growing season leads to decay of the planting material.
  • Drought. Without moisture, the development of shoots on the root crop is inhibited or stopped altogether. (Even with the required amount of micro and macronutrients!)

2. Diseases and pests

Potato pest - MedvedkaOnly planted potatoes are a tasty morsel for insect pests that live in the soil that have woken up after hibernation. Among the most notorious types of malware:

  1. Medvedka, or cabbage.
  2. May beetle larva (furrow).
  3. Wireworm (larvae).

They are especially gluttonous: they make moves in the tubers, gnaw at the sprouts. Inhabited in large quantities on the site, they can destroy up to 80-100% of seed tubers.

Fungal disease of potato tubersVarious fungal diseases prevent the emergence of seedlings:

  • late blight;
  • rhizoctonia (black scab);
  • gray spot
  • potato cancer
  • dry rot, etc..

3. Incorrect storage of seed

Preparation of quality seed materialInexperienced or unscrupulous preparation of tubers for planting reduces the percentage of their germination by 50-100%. To avoid such an extremely negative result, it is strictly prohibited to:

  • store tubers in plastic (polyethylene, polypropylene) bags;
  • do not sort them before planting (do not select damaged and infected tubers);
  • do not germinate;
  • prepare tiny tubers for planting (less than 15-20 g);
  • treat with fungicides / insecticides and growth stimulants, overstating the consumption rate;
  • use potato varieties that are poorly adapted to the climatic conditions of the region.

If there is a need to buy potato seeds, in no case should you go to a supermarket or a grocery store for them. Tubers intended for human consumption, as a rule, are treated with a special chemical solution so that they retain their presentation for a longer time and do not sprout.

How to achieve high germination of potatoes?

  1. Sprouting potatoes before plantingSort potatoes: reject diseased and damaged (bruised, chopped) tubers.
  2. Place the seed in shallow boxes (ideally in one layer). And then place them for 2.5-3 weeks in a well-lit room, in which the air temperature is at least 15 ° C.
  3. Throughout the entire vernalization (germination) stage, spray the tubers with water at intervals of 6-7 days.
  4. Consider weather conditions when choosing a day to plant potatoes.

Experienced gardeners recommend that in the process of planting plantation be guided by the rule of “three dozen”, or three signs: 10 C ° – soil temperature; 10 cm – the depth of the landing hole; 10 days is the time for shoots to appear. In their words, this is the best recipe for getting rid of the alarming question “why potatoes don’t sprout?”

  1. Immediately before planting, treat the sprouted tubers with copper sulfate (the concentration of the solution should not exceed 2 g per 10 l).

Take these five operations as a mandatory minimum, and the chances of a high potato yield will increase many times over..

Secrets of a high yield of potatoes – video

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