5 plants to sow in September

 September is a good time for sowing some flower and vegetable plants. Here are five species that you can sow this month.

5 plants to sow in September
iStock/aimintang
The thimble inspires us in summer with its impressive flower candles. In late summer it can be sown in suitable places in the garden

Biennial flowers like the foxglove like to sow themselves in September. 

If you want to plant the summer bloomers in selected places 

in your garden, you can help with the sowing. 

In the vegetable garden this month we can lay the foundation 

for the autumn and winter harvest of spinach and Asian salads. 

Late summer is also a good sowing time for some green manure plants.

Which plants can be sown in September?

  • Thimble
  • Yellow false poppy
  • bee friend
  • Spinach
  • Asia Salads

Sow thimble in September

Immediately after seed ripening in late summer is the ideal time for sowing thimble (digitalis). 

Suitable for the biennial plants is a permeable and humus-rich soil, 

which should not be too calcareous and should be in partial shade. 

As the seeds are very fine and light, 

it is best to first mix them with sand and then scatter them widely. 

Take care to press the seeds only slightly - this is the best way 

for the light germ buds to thrive. 

Water the seeds carefully with a fine nozzle and keep 

the soil moderately moist for the next few weeks. 

Alternatively, you can also sow thimbles in small plant pots with 

growing soil and then place the plants in the bed one by one. 

By autumn, dense rosettes of leaves usually form, 

which with a little luck will develop into attractive inflorescences the following year.

Sowing the forest poppy

5 plants to sow in September
GMH/Peter Behrens
The yellow poppy opens its bright yellow flowers from June to September


The Yellow Poppy (Meconopsis cambrica), 

also known as the forest poppy, is an enrichment for every natural garden. 

Similar to foxglove, its seeds ripen in late summer. 

It grows best in a cool, semi-shady place, 

sheltered from the wind. Important for the short-lived 

perennials is a fresh, permeable, humusy and rather acidic soil. 

First loosen the soil with a rake and then scatter the seeds. 

Press them only lightly and sprinkle them with water. 

The soil must not dry out in the coming weeks either. 

Funkies or ferns are beautiful partners for the yellow poppy.

Sowing bee friend as green manure

5 plants to sow in September
MSG/Christian Long
Even if the bee friend does not come this year to the bloom any longer, it fulfills an important task as humus supplier and weed suppressor

A green manure with the bee friend (Phacelia tanacetifolia) works like a cure for the soil. 

In September you can still sow the green manure plant wonderfully on open vegetable beds. 

It is best to spread the fine seeds broadly on the well loosened soil 

and then work them in lightly with a rake - in this way 

the seeds are better protected from drying out and well embedded in the soil. 

Make sure that the substrate does not dry out during the germination phase in the following weeks.
In December, cut off the stems and leave the herb on the beds. 

In spring, work the plant remains into the soil while digging - 

this is how valuable humus is created. 

The deeply loosened, nutrient-rich soil is a good 

starting point for the subsequent vegetable plants.

Sowing spinach for autumn and winter

5 plants to sow in September
MSG/Martin Staffler
The last sowing date for autumn and winter spinach is mid-September, in mild regions early October



In order to enjoy vitamin-rich spinach (Spinacia oleracea) 

even in the cold season, we recommend sowing robust autumn and winter varieties in September. 

The late, mildew-resistant variety 'Lazio', 

for example, has proven its worth. 

Winter giant 'Verdil' is characterized by large, strong leaves, 'Nobel' is a hardy spinach with dark green leaves.

In general, spinach thrives best in deep, humusy and moist soil. 

Sow the seeds two to three centimeters deep with a row 

distance of 20 to 35 centimeters. 

Since spinach is one of the dark germinators, 

the seeds must be well covered with soil. 

To protect the plants from cold, it is better to cultivate them 

under a fleece tunnel or foil. You can harvest the vegetables 

from the beginning of November - winterproof varieties even 

until the beginning of April. The plants survive frosts 

down to -12 degrees Celsius best with two to four leaves.

Sowing of Asian salads in September

5 plants to sow in September
MSG/Beate Leufen-Bohlsen
Asian salads, like here Mizuna, can be sown outdoors until September


Whether as fine cooking vegetables, soup garnish or fried in the wok: 

Asian salads can be used in many ways in the kitchen. 

In the open field, you can sow the leafy vegetables until the end of September, 

and in the unheated greenhouse, Asian salads can even be grown all year round. 

When sowing in rows, a row spacing of between 15 and 25 centimeters is usually common.

In a normal garden soil, the weak to middle eaters do not need any additional fertilization. 

Very cold-tolerant varieties of leaf mustard are 

for example 'Red Giant' or 'Green in the snow'. 

Mizuna is becoming increasingly popular: 

this very cold-tolerant salad herb forms dense rosettes of strongly pinnate, 

light green leaves that taste like cabbage. 

After eight to nine weeks at the latest, 

the salads are ready for harvest and can be cut more often, depending on the variety.

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