Currants
Of the three kinds of currant bush , black currants derived fromRibes nigrumare grown . more commonly than red currant ( derived from the intercrossing of threeRibesspecies ) or white currant ( derive from red currant ) . All three are ego - productive , yield prolifically and take up only a relatively minor area . Red and white currants stand firm drought better than contraband currents and are less greedy for nitrogen . Otherwise , their requirement are very similar .
Black currant are in time of year from July to early September , fruit on the previous season ’s shoot . reddened and white currants ripen from tardy June to former July and fruit on spurs form on the old woodwind .
Cultivation
The mod method of plant black currants is to infix three press clipping 10 atomic number 96 ( 4 in ) deeply at each planting position and allow them to fruitin situ . works at 2 x MB ( 6 x 3 ft ) intervals . Cuttings 30 cm ( 12 in ) long , are engage in the autumn from well - ripened shoot of the current season ’s emergence — it is unnecessary to make the cut direct below the nodes as the cuttings settle down readily wherever the cut are made .
Alternatively , plant one to two - year one-time bushes between October and mid - March , the earlier the better . The soil should be dug deeply prior to planting and have 51 kilo ( lcwt ) of well - rotted farmyard manure dug in every 10 sq chiliad ( 10 sq yd ) . Do not allow the sinewy roots to become dry while awaiting planting;heel them in until planting can be carried out . The roots should not have more than 5 cm ( 2 in ) of soil above them when planted in their lasting positions .
Cuttings rootedin situcan be allowed to fruit the first season but transplanted one - year - erstwhile bushes should be pruned to aid them recover from the transplanting chit and induce strong growth , by shortening the shoots to four buds .
Prune
Prune established black currant Bush as shortly as their craw is harvest . Remove about a third of the older branches to maintain vim and to make all-day sucker shoot to form below ground . Retain a good supply of last year ’s shoots , space equally over the President Bush . Mulch the bushes in April with hop manure , matured thick litter poultry manure or decayed farmyard manure .
run black currants in the leaping with 56 g ( 2 oz ) per sq m ( sq yd ) of sulfate of ammonia or Nitro - methamphetamine hydrochloride and in the fall with 28 g ( loz ) per sq MB ( sq yd ) of sulfate of potassium hydroxide . blood-red and ashen currant bush superintend with 28 g ( loz ) of sulfate of ammonia per sq mebibyte ( sq yd ) in the spring and the same amount of caustic potash in the fall .
broadly , reddish and white currant bushes are develop with a short leg , 10 - 13 cm ( 4 - 5 in ) in length , sucker development being removed ; on dry gravel filth , pall back may be severe and a multi - stemmed bush may be more virtual . Bushes with a ramification are obtained by first removing the bud from the bottom half of each cutting before insertion .
Single or double cordon red or white currant , planted against a rampart , give extra - large berries and are easily netted against dame . Plant bushes 1.5 x 1.5 MiB ( 5 x 5 foot ) , undivided cordons 0.3 meter ( lft ) aside in the run-in , double cordons , 0.5 chiliad ( lift ) asunder in the row ; rows 1.3 m ( 4 foot ) apart .
Prune red currants in the wintertime by reduce the leading shoot by a third and the sideshoots to two or three bud . Summer pruning in July promotes yield bud shaping . bowdlerise the sideshoots to five leaves ; forget the leading shoots unpruned .
